Bump eslint from 0.24.1 to 6.6.0

Bumps [eslint](https://github.com/eslint/eslint) from 0.24.1 to 6.6.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v0.24.1...v6.6.0)

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

Author: dependabot[bot]

package.json

@@ -26,7 +26,7 @@
     "chai": "^2.3.0",
     "chai-immutable": "^1.2.0",
     "coveralls": "^2.11.2",
-    "eslint": "^0.24.1",
+    "eslint": "^6.6.0",
     "immutable": "^3.7.4",
     "istanbul": "^0.3.14",
     "mocha": "^2.2.5",