Bump eslint from 3.19.0 to 4.19.1

Bumps [eslint](https://github.com/eslint/eslint) from 3.19.0 to 4.19.1.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v3.19.0...v4.19.1)

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

package.json

@@ -71,7 +71,7 @@
     "cross-env": "^5.0.0",
     "cross-spawn": "^5.1.0",
     "css-loader": "^0.25.0",
-    "eslint": "^3.14.1",
+    "eslint": "^4.19.1",
     "eslint-config-standard": "^6.1.0",
     "eslint-friendly-formatter": "^2.0.5",
     "eslint-loader": "^1.6.1",