Update file-loader to the latest version 🚀 (#1385)

* chore(package): update file-loader to version 4.3.0

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -86,7 +86,7 @@
     "eslint": "6.7.2",
     "eslint-plugin-jest": "23.1.1",
     "eslint-plugin-react": "7.17.0",
-    "file-loader": "4.2.0",
+    "file-loader": "4.3.0",
     "http-server": "0.12.0",
     "jest": "24.8.0",
     "marked": "0.7.0",