FEATURE: Update Font Awesome to v5.4.1 and SVGs (#6557)

* First take on subsetting svg icons

* FontAwesome 5 svg subset WIP

* Include icons from plugins/badges into svg sprite subset

* add svg icon support to themes

* Add spec for SvgSprite

* Misc. SVG icon fixes

* Use FA5 svgs in local-dates plugin

* CSS adjustments, fix SVG icons in group flair

* Use SVG icons in poll plugin

* Add SVG icons to /wizard

package.json

@@ -6,6 +6,7 @@
   "author": "Discourse",
   "license": "MIT",
   "dependencies": {
+    "@fortawesome/fontawesome-free": "^5.4.1",
     "ace-builds": "1.4.1",
     "bootbox": "3.2.0",
     "chart.js": "2.7.2",
@@ -15,9 +16,9 @@
     "jquery": "3.3.1",
     "jquery-color": "1.0.0",
     "jquery-resize": "https://github.com/cowboy/jquery-resize/",
+    "jquery-tags-input": "1.3.5",
     "jquery.autoellipsis": "https://github.com/pvdspek/jquery.autoellipsis",
     "jquery.cookie": "1.4.1",
-    "jquery-tags-input": "1.3.5",
     "magnific-popup": "1.1.0",
     "markdown-it": "8.4.1",
     "mousetrap": "https://github.com/discourse/mousetrap#firefox-alt-key",