chore(deps-dev): bump eslint from 3.18.0 to 4.18.2

Bumps [eslint](https://github.com/eslint/eslint) from 3.18.0 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@v3.18.0...v4.18.2)

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

Author: dependabot[bot]

package.json

@@ -53,7 +53,7 @@
     "connect-history-api-fallback": "^1.1.0",
     "cross-env": "^3.2.4",
     "css-loader": "^0.28.0",
-    "eslint": "^3.18.0",
+    "eslint": "^4.18.2",
     "eslint-config-standard": "^7.1.0",
     "eslint-friendly-formatter": "^2.0.5",
     "eslint-loader": "^1.7.0",