Bump file-loader from 3.0.1 to 6.0.0

Bumps [file-loader](https://github.com/webpack-contrib/file-loader) from 3.0.1 to 6.0.0.
- [Release notes](https://github.com/webpack-contrib/file-loader/releases)
- [Changelog](https://github.com/webpack-contrib/file-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/file-loader@v3.0.1...v6.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package.json

@@ -54,7 +54,7 @@
     "enzyme-to-json": "3.3.5",
     "eslint": "5.16.0",
     "eslint-plugin-react": "7.12.4",
-    "file-loader": "3.0.1",
+    "file-loader": "6.0.0",
     "gh-pages": "2.0.1",
     "html-loader": "0.5.5",
     "html-webpack-plugin": "3.2.0",