fix(deps): update font awesome to v6

Author: renovate[bot]

package-lock.json

@@ -60,10 +60,10 @@
     "babel-polyfill": "6.26.0",
     "react-responsive": "8.2.0",
     "react-transition-group": "4.4.5",
-    "@fortawesome/fontawesome-svg-core": "1.2.36",
-    "@fortawesome/free-brands-svg-icons": "5.15.4",
-    "@fortawesome/free-regular-svg-icons": "5.15.4",
-    "@fortawesome/free-solid-svg-icons": "5.15.4",
+    "@fortawesome/fontawesome-svg-core": "6.7.2",
+    "@fortawesome/free-brands-svg-icons": "6.7.2",
+    "@fortawesome/free-regular-svg-icons": "6.7.2",
+    "@fortawesome/free-solid-svg-icons": "6.7.2",
     "@fortawesome/react-fontawesome": "^0.2.0"
   },
   "peerDependencies": {