Bump eslint from 5.6.1 to 6.2.0

Bumps [eslint](https://github.com/eslint/eslint) from 5.6.1 to 6.2.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v5.6.1...v6.2.0)

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

package.json

@@ -28,7 +28,7 @@
     "chai-as-promised": "^7.1.1",
     "coveralls": "^3.0.0",
     "data-driven": "^1.3.0",
-    "eslint": "^5.6.1",
+    "eslint": "^6.2.0",
     "get-port": "^4.0.0",
     "istanbul": "v1.1.0-alpha.1",
     "mocha": "^5.2.0",