* Port to Babel 7
Use the Babel 7 @babel/core transpiler, falling back to the older babel-core version if possible.
* Use Babel 7 and preset-env 7 to build the browser compiler and test Babel transpilation
* Update docs for Babel 7
* Update links to use https://coffeescript.org
* 2.3.1 changelog
* Bump version to 2.3.1; update output
* Forgot one
* Another one
* Lock Babel versions for Node 6 build to succeed, until Babel 7 is out
* Move the building of the comments hash into its own function, to make clearer that it only happens once
* Abstract token comments dictionary
* Format comments
* Allow attaching a “data” property to tokens, to allow extra info to pass through the parser into the node classes
* Add data to StringLiteral tokens such that we should be able to deindent them in the nodes class
* Update output
* Another comment fix
* Add data to every token, with common properties
* Be more defensive, even though we apparently don't need to be
* Improve comments
* Remove the token data property, leaving all unrelated improvements
* Code review improvements; update output
* Explicitly turn off minify mangling, because it was previously implicitly disabled by the existence of the `eval` call we’re about to remove
* Update babel-core
* Run browser-compiled scripts using window.eval rather than just eval, to use a clean scope (many times faster)
* Update output
* Fix browser-based test broken by #5028
* Update output
* Move analytics initialization into docs.coffee
* Bump Bootstrap and CodeMirror versions
* Update output
* Merge CodeMirror styles
* Update CodeMirror styles
* Better flexbox layout for docs, including flex auto-sized sidebar and main column
* Minor styling fixes for Edge
* Fix scrollspy for new layout
* Update output
* Clicking on the CoffeeScript logo in the navbar should scroll to top; fix main column width on mobile
* Update output
* 2.3.0 changelog
* Update operators section for **
* Update docs for ES2018 object rest/spread
* Remove references to Node's experimental modules support
* Move the README coffee cup to the right side, so our name isn't cut off on the NPM page; update README and CONTRIBUTING text
* Update dependencies
* Add compatibility note for async generators
* Bump version to 2.3.0 and update output
* Have CI test in Node 10 instead of 9
* Somehow this gets generated slightly differently in Node 10
* Fix#4042: Update broken link
* Support ES2018 regex dotall flag
* Test in Node 9
* Alphabetize regex flags
* Split regex dotall test into its own file, use new feature detection method of loading it
* Update docs to explain compatibility for ES2018 and newer Node features
* Remove unnecessary paragraph
* Passthrough exponentiation operator; remove tests that are invalid JavaScript
* Treat **= as a passthrough assignment
* Get tests passing in Node 6
* Improve scoping
* Move exponentiation tests into their own file, now that it's filtered out by Cakefile
* Restore original test
* Test cases for #4852, get/set oddities
* Fix soak before accessor call to `get` or `set`
* Fixes#4852: More get/set cases; cleanup style
* Check for tokens' existence before referencing them
* fix#3921: inline function without parentheses used in condition
* add grammar rules
* fix issue #2343
* typos
* multiple 'else' in line
* close 'else if'
