Ensure installed correct version of modules on startup, bump dependencies (#6207)

* Ensure installed correct version of modules

* Bump dependencies

* Bump promise-polyfill

* Fix emailer test

* Fix auto-install regression

introduced in 9b5e0f9e95

src/meta/js.js

@@ -14,6 +14,7 @@ var JS = module.exports;
 
 JS.scripts = {
 	base: [
+		'node_modules/promise-polyfill/dist/polyfill.js',
 		'node_modules/jquery/dist/jquery.js',
 		'node_modules/socket.io-client/dist/socket.io.js',
 		'public/vendor/jquery/timeago/jquery.timeago.js',
@@ -36,7 +37,6 @@ JS.scripts = {
 		'public/src/ajaxify.js',
 		'public/src/overrides.js',
 		'public/src/widgets.js',
-		'node_modules/promise-polyfill/promise.js',
 	],
 
 	// files listed below are only available client-side, or are bundled in to reduce # of network requests on cold load