diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 00000000..3937d5c4
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,97 @@
+name: Test
+on: [push, pull_request]
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        gemfile:
+          - Gemfile
+          - gemfiles/Gemfile-rails-6-0
+          - gemfiles/Gemfile-rails-5-2
+          - gemfiles/Gemfile-rails-5-1
+          - gemfiles/Gemfile-rails-5-0
+          - gemfiles/Gemfile-rails-4-2
+          - gemfiles/Gemfile-rails-4-1
+        ruby:
+          - 2.1
+          - 2.2
+          - 2.3
+          - 2.4
+          - 2.5
+          - 2.6
+          - 2.7
+        env:
+          - DEVISE_ORM=active_record
+          - DEVISE_ORM=mongoid
+        exclude:
+          - ruby: 2.1
+            gemfile: Gemfile
+          - ruby: 2.1
+            gemfile: gemfiles/Gemfile-rails-6-0
+          - ruby: 2.1
+            gemfile: gemfiles/Gemfile-rails-5-2
+          - ruby: 2.1
+            gemfile: gemfiles/Gemfile-rails-5-1
+          - ruby: 2.1
+            gemfile: gemfiles/Gemfile-rails-5-0
+          - ruby: 2.2
+            gemfile: Gemfile
+          - ruby: 2.2
+            gemfile: gemfiles/Gemfile-rails-6-0
+          - ruby: 2.2
+            gemfile: gemfiles/Gemfile-rails-5-2
+          - ruby: 2.3
+            gemfile: Gemfile
+          - ruby: 2.3
+            gemfile: gemfiles/Gemfile-rails-6-0
+          - ruby: 2.4
+            gemfile: Gemfile
+          - ruby: 2.4
+            gemfile: gemfiles/Gemfile-rails-6-0
+          - ruby: 2.4
+            gemfile: gemfiles/Gemfile-rails-4-1
+          - ruby: 2.5
+            gemfile: gemfiles/Gemfile-rails-4-1
+          - ruby: 2.6
+            gemfile: gemfiles/Gemfile-rails-4-1
+          - ruby: 2.6
+            gemfile: gemfiles/Gemfile-rails-4-2
+          - ruby: 2.7
+            gemfile: gemfiles/Gemfile-rails-4-1
+          - ruby: 2.7
+            gemfile: gemfiles/Gemfile-rails-4-1
+          - ruby: 2.7
+            gemfile: gemfiles/Gemfile-rails-4-2
+          - ruby: 2.7
+            gemfile: gemfiles/Gemfile-rails-5-0
+          - ruby: 2.7
+            gemfile: gemfiles/Gemfile-rails-5-1
+          - ruby: 2.7
+            gemfile: gemfiles/Gemfile-rails-5-2
+          - env: DEVISE_ORM=mongoid
+            gemfile: Gemfile
+          - env: DEVISE_ORM=mongoid
+            gemfile: gemfiles/Gemfile-rails-5-0
+          - env: DEVISE_ORM=mongoid
+            gemfile: gemfiles/Gemfile-rails-5-1
+          - env: DEVISE_ORM=mongoid
+            gemfile: gemfiles/Gemfile-rails-5-2
+          - env: DEVISE_ORM=mongoid
+            gemfile: gemfiles/Gemfile-rails-6-0
+    runs-on: ubuntu-latest
+    env: # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
+      BUNDLE_GEMFILE: ${{ matrix.gemfile }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Bundler 1.x for Rails 4.x
+        if: ${{ matrix.gemfile == 'gemfiles/Gemfile-rails-4-1' || matrix.gemfile == 'gemfiles/Gemfile-rails-4-2' }}
+        run: echo "BUNDLER_VERSION=1.17.3" >> $GITHUB_ENV
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true # runs bundle install and caches installed gems automatically
+          bundler: ${{ env.BUNDLER_VERSION || 'latest' }}
+      - uses: supercharge/mongodb-github-action@1.3.0
+        if: ${{ matrix.env == 'DEVISE_ORM=mongoid' }}
+      - run: bundle exec rake
diff --git a/.gitignore b/.gitignore
index 0ff77427..ac2a9578 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ rdoc/*
 pkg
 log
 test/tmp/*
+gemfiles/*.lock
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 3d1b6451..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,110 +0,0 @@
-language: ruby
-
-rvm:
-  - 2.1.10
-  - 2.2.10
-  - 2.3.8
-  - 2.4.10
-  - 2.5.8
-  - 2.6.6
-  - 2.7.1
-  - ruby-head
-
-gemfile:
-  - Gemfile
-  - gemfiles/Gemfile.rails-6.0-stable
-  - gemfiles/Gemfile.rails-5.2-stable
-  - gemfiles/Gemfile.rails-5.1-stable
-  - gemfiles/Gemfile.rails-5.0-stable
-  - gemfiles/Gemfile.rails-4.2-stable
-  - gemfiles/Gemfile.rails-4.1-stable
-
-matrix:
-  exclude:
-    - rvm: 2.1.10
-      gemfile: Gemfile
-    - rvm: 2.1.10
-      gemfile: gemfiles/Gemfile.rails-6.0-stable
-    - rvm: 2.1.10
-      gemfile: gemfiles/Gemfile.rails-5.2-stable
-    - rvm: 2.1.10
-      gemfile: gemfiles/Gemfile.rails-5.1-stable
-    - rvm: 2.1.10
-      gemfile: gemfiles/Gemfile.rails-5.0-stable
-    - rvm: 2.2.10
-      gemfile: Gemfile
-    - rvm: 2.2.10
-      gemfile: gemfiles/Gemfile.rails-6.0-stable
-    - rvm: 2.2.10
-      gemfile: gemfiles/Gemfile.rails-5.2-stable
-    - rvm: 2.3.8
-      gemfile: Gemfile
-    - rvm: 2.3.8
-      gemfile: gemfiles/Gemfile.rails-6.0-stable
-    - rvm: 2.4.10
-      gemfile: Gemfile
-    - rvm: 2.4.10
-      gemfile: gemfiles/Gemfile.rails-6.0-stable
-    - rvm: 2.4.10
-      gemfile: gemfiles/Gemfile.rails-4.1-stable
-    - rvm: 2.5.8
-      gemfile: gemfiles/Gemfile.rails-4.1-stable
-    - rvm: 2.6.6
-      gemfile: gemfiles/Gemfile.rails-4.1-stable
-    - rvm: 2.6.6
-      gemfile: gemfiles/Gemfile.rails-4.2-stable
-    - rvm: 2.7.1
-      gemfile: gemfiles/Gemfile.rails-4.1-stable
-    - rvm: 2.7.1
-      gemfile: gemfiles/Gemfile.rails-4.1-stable
-    - rvm: 2.7.1
-      gemfile: gemfiles/Gemfile.rails-4.2-stable
-    - rvm: 2.7.1
-      gemfile: gemfiles/Gemfile.rails-5.0-stable
-    - rvm: 2.7.1
-      gemfile: gemfiles/Gemfile.rails-5.1-stable
-    - rvm: 2.7.1
-      gemfile: gemfiles/Gemfile.rails-5.2-stable
-    - rvm: ruby-head
-      gemfile: gemfiles/Gemfile.rails-4.1-stable
-    - rvm: ruby-head
-      gemfile: gemfiles/Gemfile.rails-4.2-stable
-    - env: DEVISE_ORM=mongoid
-      gemfile: Gemfile
-    - env: DEVISE_ORM=mongoid
-      gemfile: gemfiles/Gemfile.rails-5.0-stable
-    - env: DEVISE_ORM=mongoid
-      gemfile: gemfiles/Gemfile.rails-5.1-stable
-    - env: DEVISE_ORM=mongoid
-      gemfile: gemfiles/Gemfile.rails-5.2-stable
-    - env: DEVISE_ORM=mongoid
-      gemfile: gemfiles/Gemfile.rails-6.0-stable
-  allow_failures:
-    - rvm: ruby-head
-
-services:
-  - mongodb
-
-cache: bundler
-
-env:
-  matrix:
-    - DEVISE_ORM=active_record
-    - DEVISE_ORM=mongoid
-
-before_install:
-  - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
-  - gem install bundler -v '< 2'
-  - "rm ${BUNDLE_GEMFILE}.lock"
-
-before_script: "bundle update"
-
-script: "bin/test"
-
-notifications:
-  email: false
-  slack:
-    on_pull_requests: false
-    on_success: change
-    on_failure: always
-    secure: Q3M+kmude3FjisibEeeGe0wSMXgvwLH+vL7Zrx9//q4QtkfnrQ/BBMvY9KXxPEsNF+eys4YopYjTkJ8uRmeboUATW/oQ4Jrv3+u3zkIHK2sFn/Q2cQWpK5w+CbgEnHPjKYnUu34b09njXTgDlr/mqtbPqrKeZ1dLlpKXCB/q4GY=
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 44114658..87123e14 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 * enhancements
   * Devise now enables the upgrade of OmniAuth 2+. Previously Devise would raise an error if you'd try to upgrade. Please note that OmniAuth 2 is considered a security upgrade and recommended to everyone. You can read more about the details (and possible necessary changes to your app as part of the upgrade) in [their release notes](https://github.com/omniauth/omniauth/releases/tag/v2.0.0).
     - Note that the upgrade required Devise shared links that initiate the OmniAuth flow to be changed to `method: :post`, which is now a requirement for OmniAuth, part of the security improvement. If you have copied and customized the Devise shared links partial to your app, or if you have other links in your app that initiate the OmniAuth flow, they will have to be updated to use `method: :post`, or changed to use buttons (e.g. `button_to`) to work with OmniAuth 2. (if you're using links with `method: :post`, make sure your app has `rails-ujs` or `jquery-ujs` included in order for these links to work properly.)
+  * Move CI to GitHub Actions.
 
 * deprecations
   * `Devise::Models::Authenticatable::BLACKLIST_FOR_SERIALIZATION` is deprecated in favor of `Devise::Models::Authenticatable::UNSAFE_ATTRIBUTES_FOR_SERIALIZATION` (@hanachin)
diff --git a/Gemfile b/Gemfile
index f9112334..02f409fd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ source "https://rubygems.org"
 gemspec
 
 gem "rails", "~> 6.1.0"
-gem "omniauth"
+gem "omniauth", "~> 1.0"
 gem "omniauth-oauth2"
 gem "rdoc"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 59b97e5e..b0579e8e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -215,7 +215,7 @@ DEPENDENCIES
   activemodel-serializers-xml!
   devise!
   mocha (~> 1.1)
-  omniauth
+  omniauth (~> 1.0)
   omniauth-facebook
   omniauth-oauth2
   omniauth-openid
@@ -228,4 +228,4 @@ DEPENDENCIES
   webrat (= 0.7.3)
 
 BUNDLED WITH
-   1.17.3
+   2.2.7
diff --git a/README.md b/README.md
index 53111159..bf87d38f 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,5 @@
 ![Devise Logo](https://raw.github.com/heartcombo/devise/master/devise.png)
 
-[![Build Status](https://api.travis-ci.org/heartcombo/devise.svg?branch=master)](http://travis-ci.org/heartcombo/devise)
 [![Code Climate](https://codeclimate.com/github/heartcombo/devise.svg)](https://codeclimate.com/github/heartcombo/devise)
 
 Devise is a flexible authentication solution for Rails based on Warden. It:
@@ -118,7 +117,7 @@ You will usually want to write tests for your changes.  To run the test suite, g
 Devise works with multiple Ruby and Rails versions, and ActiveRecord and Mongoid ORMs, which means you can run the test suite with some modifiers: `DEVISE_ORM` and `BUNDLE_GEMFILE`.
 
 ### DEVISE_ORM
-Since Devise support both Mongoid and ActiveRecord, we rely on this variable to run specific code for each ORM.
+Since Devise supports both Mongoid and ActiveRecord, we rely on this variable to run specific code for each ORM.
 The default value of `DEVISE_ORM` is `active_record`. To run the tests for Mongoid, you can pass `mongoid`:
 ```
 DEVISE_ORM=mongoid bin/test
@@ -131,7 +130,7 @@ Please note that the command output will show the variable value being used.
 
 ### BUNDLE_GEMFILE
 We can use this variable to tell bundler what Gemfile it should use (instead of the one in the current directory).
-Inside the [gemfiles](https://github.com/heartcombo/devise/tree/master/gemfiles) directory, we have one for each version of Rails we support. When you send us a pull request, it may happen that the test suite breaks on Travis using some of them. If that's the case, you can simulate the same environment using the `BUNDLE_GEMFILE` variable.
+Inside the [gemfiles](https://github.com/heartcombo/devise/tree/master/gemfiles) directory, we have one for each version of Rails we support. When you send us a pull request, it may happen that the test suite breaks using some of them. If that's the case, you can simulate the same environment using the `BUNDLE_GEMFILE` variable.
 For example, if the tests broke using Ruby 2.4.2 and Rails 4.1, you can do the following:
 ```bash
 rbenv shell 2.4.2 # or rvm use 2.4.2
diff --git a/gemfiles/Gemfile.rails-4.1-stable b/gemfiles/Gemfile-rails-4-1
similarity index 96%
rename from gemfiles/Gemfile.rails-4.1-stable
rename to gemfiles/Gemfile-rails-4-1
index 44a1c98a..503d5006 100644
--- a/gemfiles/Gemfile.rails-4.1-stable
+++ b/gemfiles/Gemfile-rails-4-1
@@ -5,7 +5,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "rails", github: "rails/rails", branch: "4-1-stable"
-gem "omniauth"
+gem "omniauth", "~> 1.0"
 gem "omniauth-oauth2"
 gem "rdoc", "~> 5.1"
 # Force this version because it's breaking on CI since a higher nokogiri version requires Ruby 2.3+.
diff --git a/gemfiles/Gemfile.rails-4.2-stable b/gemfiles/Gemfile-rails-4-2
similarity index 96%
rename from gemfiles/Gemfile.rails-4.2-stable
rename to gemfiles/Gemfile-rails-4-2
index bb35c5f2..ffb78bc1 100644
--- a/gemfiles/Gemfile.rails-4.2-stable
+++ b/gemfiles/Gemfile-rails-4-2
@@ -5,7 +5,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "rails", github: "rails/rails", branch: "4-2-stable"
-gem "omniauth"
+gem "omniauth", "~> 1.0"
 gem "omniauth-oauth2"
 gem "rdoc", "~> 5.1"
 gem "nokogiri", "1.9.1"
diff --git a/gemfiles/Gemfile.rails-5.0-stable b/gemfiles/Gemfile-rails-5-0
similarity index 95%
rename from gemfiles/Gemfile.rails-5.0-stable
rename to gemfiles/Gemfile-rails-5-0
index dcd1ac14..d737977c 100644
--- a/gemfiles/Gemfile.rails-5.0-stable
+++ b/gemfiles/Gemfile-rails-5-0
@@ -5,7 +5,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "rails", '~> 5.0.0'
-gem "omniauth"
+gem "omniauth", "~> 1.0"
 gem "omniauth-oauth2"
 gem "rdoc"
 
diff --git a/gemfiles/Gemfile.rails-5.1-stable b/gemfiles/Gemfile-rails-5-1
similarity index 94%
rename from gemfiles/Gemfile.rails-5.1-stable
rename to gemfiles/Gemfile-rails-5-1
index c2b8f523..5f8d6ff8 100644
--- a/gemfiles/Gemfile.rails-5.1-stable
+++ b/gemfiles/Gemfile-rails-5-1
@@ -3,7 +3,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "rails", '~> 5.1.0'
-gem "omniauth"
+gem "omniauth", "~> 1.0"
 gem "omniauth-oauth2"
 gem "rdoc"
 
diff --git a/gemfiles/Gemfile.rails-5.2-stable b/gemfiles/Gemfile-rails-5-2
similarity index 94%
rename from gemfiles/Gemfile.rails-5.2-stable
rename to gemfiles/Gemfile-rails-5-2
index dbfbd5f6..8c061803 100644
--- a/gemfiles/Gemfile.rails-5.2-stable
+++ b/gemfiles/Gemfile-rails-5-2
@@ -3,7 +3,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "rails", '~> 5.2.0'
-gem "omniauth"
+gem "omniauth", "~> 1.0"
 gem "omniauth-oauth2"
 gem "rdoc"
 
diff --git a/gemfiles/Gemfile.rails-6.0-stable b/gemfiles/Gemfile-rails-6-0
similarity index 95%
rename from gemfiles/Gemfile.rails-6.0-stable
rename to gemfiles/Gemfile-rails-6-0
index e4328485..c013f9aa 100644
--- a/gemfiles/Gemfile.rails-6.0-stable
+++ b/gemfiles/Gemfile-rails-6-0
@@ -3,7 +3,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "rails", '~> 6.0.0'
-gem "omniauth"
+gem "omniauth", "~> 1.0"
 gem "omniauth-oauth2"
 gem "rdoc"
 
diff --git a/gemfiles/Gemfile.rails-4.1-stable.lock b/gemfiles/Gemfile.rails-4.1-stable.lock
deleted file mode 100644
index 9750efb8..00000000
--- a/gemfiles/Gemfile.rails-4.1-stable.lock
+++ /dev/null
@@ -1,171 +0,0 @@
-GIT
-  remote: https://github.com/rails/rails.git
-  revision: 0cad778c2605a5204a05a9f1dbd3344e39f248d8
-  branch: 4-1-stable
-  specs:
-    actionmailer (4.1.16)
-      actionpack (= 4.1.16)
-      actionview (= 4.1.16)
-      mail (~> 2.5, >= 2.5.4)
-    actionpack (4.1.16)
-      actionview (= 4.1.16)
-      activesupport (= 4.1.16)
-      rack (~> 1.5.2)
-      rack-test (~> 0.6.2)
-    actionview (4.1.16)
-      activesupport (= 4.1.16)
-      builder (~> 3.1)
-      erubis (~> 2.7.0)
-    activemodel (4.1.16)
-      activesupport (= 4.1.16)
-      builder (~> 3.1)
-    activerecord (4.1.16)
-      activemodel (= 4.1.16)
-      activesupport (= 4.1.16)
-      arel (~> 5.0.0)
-    activesupport (4.1.16)
-      i18n (~> 0.6, >= 0.6.9)
-      json (~> 1.7, >= 1.7.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.1)
-      tzinfo (~> 1.1)
-    rails (4.1.16)
-      actionmailer (= 4.1.16)
-      actionpack (= 4.1.16)
-      actionview (= 4.1.16)
-      activemodel (= 4.1.16)
-      activerecord (= 4.1.16)
-      activesupport (= 4.1.16)
-      bundler (>= 1.3.0, < 2.0)
-      railties (= 4.1.16)
-      sprockets-rails (~> 2.0)
-    railties (4.1.16)
-      actionpack (= 4.1.16)
-      activesupport (= 4.1.16)
-      rake (>= 0.8.7)
-      thor (>= 0.18.1, < 2.0)
-
-PATH
-  remote: ..
-  specs:
-    devise (4.7.3)
-      bcrypt (~> 3.0)
-      orm_adapter (~> 0.1)
-      railties (>= 4.1.0)
-      responders
-      warden (~> 1.2.3)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    arel (5.0.1.20140414130214)
-    bcrypt (3.1.13)
-    bson (3.2.7)
-    builder (3.2.4)
-    concurrent-ruby (1.1.6)
-    connection_pool (2.2.3)
-    erubis (2.7.0)
-    faraday (1.0.1)
-      multipart-post (>= 1.2, < 3)
-    hashie (3.6.0)
-    i18n (0.9.5)
-      concurrent-ruby (~> 1.0)
-    json (1.8.6)
-    jwt (2.2.1)
-    mail (2.7.1)
-      mini_mime (>= 0.1.1)
-    mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
-    minitest (5.14.1)
-    mocha (1.11.2)
-    mongoid (4.0.2)
-      activemodel (~> 4.0)
-      moped (~> 2.0.0)
-      origin (~> 2.1)
-      tzinfo (>= 0.3.37)
-    moped (2.0.7)
-      bson (~> 3.0)
-      connection_pool (~> 2.0)
-      optionable (~> 0.2.0)
-    multi_json (1.14.1)
-    multi_xml (0.6.0)
-    multipart-post (2.1.1)
-    nokogiri (1.9.1)
-      mini_portile2 (~> 2.4.0)
-    oauth2 (1.4.4)
-      faraday (>= 0.8, < 2.0)
-      jwt (>= 1.0, < 3.0)
-      multi_json (~> 1.3)
-      multi_xml (~> 0.5)
-      rack (>= 1.2, < 3)
-    omniauth (1.4.2)
-      hashie (>= 1.2, < 4)
-      rack (>= 1.0, < 3)
-    omniauth-facebook (6.0.0)
-      omniauth-oauth2 (~> 1.2)
-    omniauth-oauth2 (1.5.0)
-      oauth2 (~> 1.1)
-      omniauth (~> 1.2)
-    omniauth-openid (1.0.1)
-      omniauth (~> 1.0)
-      rack-openid (~> 1.3.1)
-    optionable (0.2.0)
-    origin (2.3.1)
-    orm_adapter (0.5.0)
-    rack (1.5.5)
-    rack-openid (1.3.1)
-      rack (>= 1.1.0)
-      ruby-openid (>= 2.1.8)
-    rack-test (0.6.3)
-      rack (>= 1.0)
-    rake (13.0.1)
-    rdoc (5.1.0)
-    responders (1.1.2)
-      railties (>= 3.2, < 4.2)
-    ruby-openid (2.9.2)
-    sprockets (3.7.2)
-      concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
-    sprockets-rails (2.3.3)
-      actionpack (>= 3.0)
-      activesupport (>= 3.0)
-      sprockets (>= 2.8, < 4.0)
-    sqlite3 (1.3.13)
-    test_after_commit (1.2.2)
-      activerecord (>= 3.2, < 5.0)
-    thor (1.0.1)
-    thread_safe (0.3.6)
-    timecop (0.9.1)
-    tzinfo (1.2.7)
-      thread_safe (~> 0.1)
-    warden (1.2.7)
-      rack (>= 1.0)
-    webrat (0.7.3)
-      nokogiri (>= 1.2.0)
-      rack (>= 1.0)
-      rack-test (>= 0.5.3)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  activerecord-jdbc-adapter
-  activerecord-jdbcsqlite3-adapter
-  devise!
-  jruby-openssl
-  mocha (~> 1.1)
-  mongoid (~> 4.0)
-  nokogiri (= 1.9.1)
-  omniauth
-  omniauth-facebook
-  omniauth-oauth2
-  omniauth-openid
-  rails!
-  rdoc (~> 5.1)
-  sqlite3 (~> 1.3.6)
-  test_after_commit
-  timecop
-  webrat (= 0.7.3)
-
-BUNDLED WITH
-   1.17.3
diff --git a/gemfiles/Gemfile.rails-4.2-stable.lock b/gemfiles/Gemfile.rails-4.2-stable.lock
deleted file mode 100644
index 76ee65a4..00000000
--- a/gemfiles/Gemfile.rails-4.2-stable.lock
+++ /dev/null
@@ -1,194 +0,0 @@
-GIT
-  remote: https://github.com/rails/rails.git
-  revision: c0cb0cbf976a3cf8ad1b0e2d0f813602a712e997
-  branch: 4-2-stable
-  specs:
-    actionmailer (4.2.11.3)
-      actionpack (= 4.2.11.3)
-      actionview (= 4.2.11.3)
-      activejob (= 4.2.11.3)
-      mail (~> 2.5, >= 2.5.4)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.11.3)
-      actionview (= 4.2.11.3)
-      activesupport (= 4.2.11.3)
-      rack (~> 1.6)
-      rack-test (~> 0.6.2)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (4.2.11.3)
-      activesupport (= 4.2.11.3)
-      builder (~> 3.1)
-      erubis (~> 2.7.0)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (4.2.11.3)
-      activesupport (= 4.2.11.3)
-      globalid (>= 0.3.0)
-    activemodel (4.2.11.3)
-      activesupport (= 4.2.11.3)
-      builder (~> 3.1)
-    activerecord (4.2.11.3)
-      activemodel (= 4.2.11.3)
-      activesupport (= 4.2.11.3)
-      arel (~> 6.0)
-    activesupport (4.2.11.3)
-      i18n (~> 0.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
-      tzinfo (~> 1.1)
-    rails (4.2.11.3)
-      actionmailer (= 4.2.11.3)
-      actionpack (= 4.2.11.3)
-      actionview (= 4.2.11.3)
-      activejob (= 4.2.11.3)
-      activemodel (= 4.2.11.3)
-      activerecord (= 4.2.11.3)
-      activesupport (= 4.2.11.3)
-      bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.11.3)
-      sprockets-rails
-    railties (4.2.11.3)
-      actionpack (= 4.2.11.3)
-      activesupport (= 4.2.11.3)
-      rake (>= 0.8.7)
-      thor (>= 0.18.1, < 2.0)
-
-PATH
-  remote: ..
-  specs:
-    devise (4.7.3)
-      bcrypt (~> 3.0)
-      orm_adapter (~> 0.1)
-      railties (>= 4.1.0)
-      responders
-      warden (~> 1.2.3)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    arel (6.0.4)
-    bcrypt (3.1.13)
-    bson (3.2.7)
-    builder (3.2.4)
-    concurrent-ruby (1.1.6)
-    connection_pool (2.2.3)
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-      multipart-post (>= 1.2, < 3)
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-      crass (~> 1.0.2)
-      nokogiri (>= 1.5.9)
-    mail (2.7.1)
-      mini_mime (>= 0.1.1)
-    mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
-    minitest (5.14.1)
-    mocha (1.11.2)
-    mongoid (4.0.2)
-      activemodel (~> 4.0)
-      moped (~> 2.0.0)
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-      optionable (~> 0.2.0)
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-      multi_json (~> 1.3)
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-      rack (>= 1.2, < 3)
-    omniauth (1.9.1)
-      hashie (>= 3.4.6)
-      rack (>= 1.6.2, < 3)
-    omniauth-facebook (6.0.0)
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-      nokogiri (~> 1.6)
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-    tzinfo (1.2.7)
-      thread_safe (~> 0.1)
-    warden (1.2.7)
-      rack (>= 1.0)
-    webrat (0.7.3)
-      nokogiri (>= 1.2.0)
-      rack (>= 1.0)
-      rack-test (>= 0.5.3)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  activerecord-jdbc-adapter
-  activerecord-jdbcsqlite3-adapter
-  devise!
-  jruby-openssl
-  mocha (~> 1.1)
-  mongoid (~> 4.0)
-  nokogiri (= 1.9.1)
-  omniauth
-  omniauth-facebook
-  omniauth-oauth2
-  omniauth-openid
-  rails!
-  rdoc (~> 5.1)
-  sqlite3 (~> 1.3.6)
-  test_after_commit
-  timecop
-  webrat (= 0.7.3)
-
-BUNDLED WITH
-   1.17.3
diff --git a/gemfiles/Gemfile.rails-5.0-stable.lock b/gemfiles/Gemfile.rails-5.0-stable.lock
deleted file mode 100644
index 7db3a5d2..00000000
--- a/gemfiles/Gemfile.rails-5.0-stable.lock
+++ /dev/null
@@ -1,190 +0,0 @@
-GIT
-  remote: https://github.com/rails/activemodel-serializers-xml.git
-  revision: 93689638c28525acc65afb638fce866826532641
-  specs:
-    activemodel-serializers-xml (1.0.2)
-      activemodel (>= 5.0.0.a)
-      activesupport (>= 5.0.0.a)
-      builder (~> 3.1)
-
-PATH
-  remote: ..
-  specs:
-    devise (4.7.3)
-      bcrypt (~> 3.0)
-      orm_adapter (~> 0.1)
-      railties (>= 4.1.0)
-      responders
-      warden (~> 1.2.3)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    actioncable (5.0.7.2)
-      actionpack (= 5.0.7.2)
-      nio4r (>= 1.2, < 3.0)
-      websocket-driver (~> 0.6.1)
-    actionmailer (5.0.7.2)
-      actionpack (= 5.0.7.2)
-      actionview (= 5.0.7.2)
-      activejob (= 5.0.7.2)
-      mail (~> 2.5, >= 2.5.4)
-      rails-dom-testing (~> 2.0)
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-      actionview (= 5.0.7.2)
-      activesupport (= 5.0.7.2)
-      rack (~> 2.0)
-      rack-test (~> 0.6.3)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.0.7.2)
-      activesupport (= 5.0.7.2)
-      builder (~> 3.1)
-      erubis (~> 2.7.0)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.0.7.2)
-      activesupport (= 5.0.7.2)
-      globalid (>= 0.3.6)
-    activemodel (5.0.7.2)
-      activesupport (= 5.0.7.2)
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-      activemodel (= 5.0.7.2)
-      activesupport (= 5.0.7.2)
-      arel (~> 7.0)
-    activesupport (5.0.7.2)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
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-    bcrypt (3.1.13)
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-    erubis (2.7.0)
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-      multipart-post (>= 1.2, < 3)
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-      nokogiri (>= 1.5.9)
-    mail (2.7.1)
-      mini_mime (>= 0.1.1)
-    method_source (1.0.0)
-    mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
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-    multi_xml (0.6.0)
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-      mini_portile2 (~> 2.4.0)
-    oauth2 (1.4.4)
-      faraday (>= 0.8, < 2.0)
-      jwt (>= 1.0, < 3.0)
-      multi_json (~> 1.3)
-      multi_xml (~> 0.5)
-      rack (>= 1.2, < 3)
-    omniauth (1.9.1)
-      hashie (>= 3.4.6)
-      rack (>= 1.6.2, < 3)
-    omniauth-facebook (6.0.0)
-      omniauth-oauth2 (~> 1.2)
-    omniauth-oauth2 (1.6.0)
-      oauth2 (~> 1.1)
-      omniauth (~> 1.9)
-    omniauth-openid (1.0.1)
-      omniauth (~> 1.0)
-      rack-openid (~> 1.3.1)
-    orm_adapter (0.5.0)
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-      activejob (= 5.0.7.2)
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-    websocket-driver (0.6.5)
-      websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.5)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  activemodel-serializers-xml!
-  devise!
-  mocha (~> 1.1)
-  omniauth
-  omniauth-facebook
-  omniauth-oauth2
-  omniauth-openid
-  rails (~> 5.0.0)
-  rails-controller-testing
-  rdoc
-  responders (~> 2.1)
-  sqlite3 (~> 1.3.6)
-  timecop
-  webrat (= 0.7.3)
-
-BUNDLED WITH
-   1.17.3
diff --git a/gemfiles/Gemfile.rails-5.1-stable.lock b/gemfiles/Gemfile.rails-5.1-stable.lock
deleted file mode 100644
index 83d2f551..00000000
--- a/gemfiles/Gemfile.rails-5.1-stable.lock
+++ /dev/null
@@ -1,190 +0,0 @@
-GIT
-  remote: https://github.com/rails/activemodel-serializers-xml.git
-  revision: 93689638c28525acc65afb638fce866826532641
-  specs:
-    activemodel-serializers-xml (1.0.2)
-      activemodel (>= 5.0.0.a)
-      activesupport (>= 5.0.0.a)
-      builder (~> 3.1)
-
-PATH
-  remote: ..
-  specs:
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-      bcrypt (~> 3.0)
-      orm_adapter (~> 0.1)
-      railties (>= 4.1.0)
-      responders
-      warden (~> 1.2.3)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
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-      actionpack (= 5.1.7)
-      nio4r (~> 2.0)
-      websocket-driver (~> 0.6.1)
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-      crass (~> 1.0.2)
-      nokogiri (>= 1.5.9)
-    mail (2.7.1)
-      mini_mime (>= 0.1.1)
-    method_source (1.0.0)
-    mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
-    minitest (5.14.1)
-    mocha (1.11.2)
-    multi_json (1.14.1)
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-      jwt (>= 1.0, < 3.0)
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-      rack (>= 1.2, < 3)
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-      rack (>= 1.6.2, < 3)
-    omniauth-facebook (6.0.0)
-      omniauth-oauth2 (~> 1.2)
-    omniauth-oauth2 (1.6.0)
-      oauth2 (~> 1.1)
-      omniauth (~> 1.9)
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-      omniauth (~> 1.0)
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-      actioncable (= 5.1.7)
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-PLATFORMS
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-
-DEPENDENCIES
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-  sqlite3 (~> 1.3.6)
-  timecop
-  webrat (= 0.7.3)
-
-BUNDLED WITH
-   1.17.3
diff --git a/gemfiles/Gemfile.rails-5.2-stable.lock b/gemfiles/Gemfile.rails-5.2-stable.lock
deleted file mode 100644
index 7e381f7a..00000000
--- a/gemfiles/Gemfile.rails-5.2-stable.lock
+++ /dev/null
@@ -1,198 +0,0 @@
-GIT
-  remote: https://github.com/rails/activemodel-serializers-xml.git
-  revision: 93689638c28525acc65afb638fce866826532641
-  specs:
-    activemodel-serializers-xml (1.0.2)
-      activemodel (>= 5.0.0.a)
-      activesupport (>= 5.0.0.a)
-      builder (~> 3.1)
-
-PATH
-  remote: ..
-  specs:
-    devise (4.7.3)
-      bcrypt (~> 3.0)
-      orm_adapter (~> 0.1)
-      railties (>= 4.1.0)
-      responders
-      warden (~> 1.2.3)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    actioncable (5.2.4.3)
-      actionpack (= 5.2.4.3)
-      nio4r (~> 2.0)
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-      actionpack (= 5.2.4.3)
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-      mail (~> 2.5, >= 2.5.4)
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-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
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-      activesupport (= 5.2.4.3)
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-      activesupport (= 5.2.4.3)
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-      activesupport (= 5.2.4.3)
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-      faraday (>= 0.8, < 2.0)
-      jwt (>= 1.0, < 3.0)
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-      hashie (>= 3.4.6)
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-    orm_adapter (0.5.0)
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-      rack (>= 1.1.0)
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-      activejob (= 5.2.4.3)
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-      activerecord (= 5.2.4.3)
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-      activesupport (= 5.2.4.3)
-      bundler (>= 1.3.0)
-      railties (= 5.2.4.3)
-      sprockets-rails (>= 2.0.0)
-    rails-controller-testing (1.0.4)
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-      activesupport (>= 5.0.1.x)
-    rails-dom-testing (2.0.3)
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-      sprockets (>= 3.0.0)
-    sqlite3 (1.3.13)
-    thor (1.0.1)
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-    timecop (0.9.1)
-    tzinfo (1.2.7)
-      thread_safe (~> 0.1)
-    warden (1.2.8)
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-      nokogiri (>= 1.2.0)
-      rack (>= 1.0)
-      rack-test (>= 0.5.3)
-    websocket-driver (0.7.2)
-      websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.5)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  activemodel-serializers-xml!
-  devise!
-  mocha (~> 1.1)
-  omniauth
-  omniauth-facebook
-  omniauth-oauth2
-  omniauth-openid
-  rails (~> 5.2.0)
-  rails-controller-testing
-  rdoc
-  responders (~> 2.1)
-  sqlite3 (~> 1.3.6)
-  timecop
-  webrat (= 0.7.3)
-
-BUNDLED WITH
-   1.17.3
diff --git a/gemfiles/Gemfile.rails-6.0-stable.lock b/gemfiles/Gemfile.rails-6.0-stable.lock
deleted file mode 100644
index 6a982d5a..00000000
--- a/gemfiles/Gemfile.rails-6.0-stable.lock
+++ /dev/null
@@ -1,219 +0,0 @@
-GIT
-  remote: https://github.com/rails/activemodel-serializers-xml.git
-  revision: 93689638c28525acc65afb638fce866826532641
-  specs:
-    activemodel-serializers-xml (1.0.2)
-      activemodel (>= 5.0.0.a)
-      activesupport (>= 5.0.0.a)
-      builder (~> 3.1)
-
-GIT
-  remote: https://github.com/rails/rails-controller-testing.git
-  revision: 4b15c86e82ee380f2a7cc009e470368f7520560a
-  specs:
-    rails-controller-testing (1.0.5)
-      actionpack (>= 5.0.1.rc1)
-      actionview (>= 5.0.1.rc1)
-      activesupport (>= 5.0.1.rc1)
-
-PATH
-  remote: ..
-  specs:
-    devise (4.7.3)
-      bcrypt (~> 3.0)
-      orm_adapter (~> 0.1)
-      railties (>= 4.1.0)
-      responders
-      warden (~> 1.2.3)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    actioncable (6.0.3.2)
-      actionpack (= 6.0.3.2)
-      nio4r (~> 2.0)
-      websocket-driver (>= 0.6.1)
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-      actionpack (= 6.0.3.2)
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-      activestorage (= 6.0.3.2)
-      activesupport (= 6.0.3.2)
-      mail (>= 2.7.1)
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-      activejob (= 6.0.3.2)
-      mail (~> 2.5, >= 2.5.4)
-      rails-dom-testing (~> 2.0)
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-      actionview (= 6.0.3.2)
-      activesupport (= 6.0.3.2)
-      rack (~> 2.0, >= 2.0.8)
-      rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actiontext (6.0.3.2)
-      actionpack (= 6.0.3.2)
-      activerecord (= 6.0.3.2)
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-      activesupport (= 6.0.3.2)
-      nokogiri (>= 1.8.5)
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-      activesupport (= 6.0.3.2)
-      builder (~> 3.1)
-      erubi (~> 1.4)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.1, >= 1.2.0)
-    activejob (6.0.3.2)
-      activesupport (= 6.0.3.2)
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-      activesupport (= 6.0.3.2)
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-      activemodel (= 6.0.3.2)
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-      actionpack (= 6.0.3.2)
-      activejob (= 6.0.3.2)
-      activerecord (= 6.0.3.2)
-      marcel (~> 0.3.1)
-    activesupport (6.0.3.2)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
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-      zeitwerk (~> 2.2, >= 2.2.2)
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-      mimemagic (~> 0.3.2)
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-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  activemodel-serializers-xml!
-  devise!
-  mocha (~> 1.1)
-  omniauth
-  omniauth-facebook
-  omniauth-oauth2
-  omniauth-openid
-  rails (~> 6.0.0)
-  rails-controller-testing!
-  rdoc
-  responders (~> 3.0)
-  sqlite3 (~> 1.4)
-  timecop
-  webrat (= 0.7.3)
-
-BUNDLED WITH
-   1.17.3