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] <[email protected]>

Author: dependabot[bot]

package.json

@@ -38,7 +38,7 @@
     "connect-history-api-fallback": "^1.1.0",
     "cross-spawn": "^4.0.2",
     "css-loader": "^0.7.0",
-    "eslint": "^3.7.1",
+    "eslint": "^4.18.2",
     "eslint-friendly-formatter": "^2.0.5",
     "eslint-loader": "^1.5.0",
     "eslint-config-standard": "^6.1.0",