Add font awesome to dev dependencies

package-lock.json

@@ -4,6 +4,12 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@fortawesome/fontawesome-free": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/@fortawesome/fontawesome-free/-/fontawesome-free-5.1.0.tgz",
+      "integrity": "sha512-0XHj3cIq7OiG2v79UldqDHLFndLXxq0hbNTvsi7zDbLXiBtMkX+exuVUX466cajlSV8rkLiwa7GhTcMIKR1ajQ==",
+      "dev": true
+    },
     "@gulp-sourcemaps/identity-map": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/@gulp-sourcemaps/identity-map/-/identity-map-1.0.1.tgz",

package.json

@@ -6,6 +6,7 @@
     "twig": "^1.12.0"
   },
   "devDependencies": {
+    "@fortawesome/fontawesome-free": "^5.1.0",
     "@types/chrome": "0.0.69",
     "@types/twig": "^1.10.1",
     "browserify": "^16.2.2",