Bump eslint from 3.19.0 to 4.18.2

Bumps [eslint](https://github.com/eslint/eslint) from 3.19.0 to 4.18.2.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v3.19.0...v4.18.2)

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

Author: dependabot[bot]

package.json

@@ -54,7 +54,7 @@
     "cross-env": "^3.1.4",
     "cross-spawn": "^5.0.1",
     "css-loader": "^0.26.1",
-    "eslint": "^3.14.1",
+    "eslint": "^4.18.2",
     "eslint-config-airbnb-base": "^11.0.1",
     "eslint-friendly-formatter": "^2.0.7",
     "eslint-import-resolver-webpack": "^0.8.1",