chore(package): update file-loader to version 5.0.0

Closes #1385

Author: greenkeeper[bot]

package.json

@@ -86,7 +86,7 @@
     "eslint": "6.7.1",
     "eslint-plugin-jest": "23.0.4",
     "eslint-plugin-react": "7.16.0",
-    "file-loader": "4.2.0",
+    "file-loader": "5.0.0",
     "http-server": "0.11.1",
     "jest": "24.8.0",
     "marked": "0.7.0",