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](https://github.com/eslint/eslint/compare/v3.19.0...v4.18.2)

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

package.json

@@ -35,6 +35,6 @@
     "babel-cli": "^6.24.1",
     "babel-core": "^6.24.1",
     "babel-preset-es2015": "^6.24.1",
-    "eslint": "^3.19.0"
+    "eslint": "^4.18.2"
   }
 }