Modernize meteor-developer-config-ui package

- Bumped patch version number 1.0.0 -> 1.0.1
- ES6 syntax and shorthand applied
- Adjusted configuration instructions

packages/meteor-developer-config-ui/meteor_developer_configure.html

@@ -6,13 +6,13 @@
   <ol>
     <li> Visit <a href="https://www.meteor.com/account-settings" target="_blank">https://www.meteor.com/account-settings</a> and sign in.
     </li>
-    <li> Click "New app" in the "Meteor developer account apps" section
+    <li> Click "NEW APPLICATION" in the "Meteor Account Services" section
       and give your app a name.</li>
     <li> Add
       <span class="url">
         {{siteUrl}}_oauth/meteor-developer
       </span>
-      as an Allowed Redirect URL.
+      as the Redirect URL.
     </li>
   </ol>
 </template>

packages/meteor-developer-config-ui/meteor_developer_configure.js

@@ -1,12 +1,8 @@
 Template.configureLoginServiceDialogForMeteorDeveloper.helpers({
-  siteUrl: function () {
-    return Meteor.absoluteUrl();
-  }
+  siteUrl: () => Meteor.absoluteUrl(),
 });
 
-Template.configureLoginServiceDialogForMeteorDeveloper.fields = function () {
-  return [
-    {property: 'clientId', label: 'App ID'},
-    {property: 'secret', label: 'App secret'}
-  ];
-};
+Template.configureLoginServiceDialogForMeteorDeveloper.fields = () => [
+  {property: 'clientId', label: 'App ID'},
+  {property: 'secret', label: 'App secret'}
+];

packages/meteor-developer-config-ui/package.js

@@ -1,9 +1,10 @@
 Package.describe({
   summary: 'Blaze configuration templates for the Meteor developer accounts OAuth.',
-  version: '1.0.0'
+  version: '1.0.1'
 });
 
-Package.onUse(function (api) {
+Package.onUse(api => {
+  api.use('ecmascript', 'client');
   api.use('templating@1.2.13', 'client');
   api.addFiles('meteor_developer_login_button.css', 'client');
   api.addFiles(