chore(deps-dev): bump eslint from 3.11.1 to 4.18.2

Bumps [eslint](https://github.com/eslint/eslint) from 3.11.1 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@v3.11.1...v4.18.2)

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

Author: dependabot[bot]

package.json

@@ -13,7 +13,7 @@
   "license": "MIT",
   "devDependencies": {
     "codecov": "^1.0.1",
-    "eslint": "^3.11.1",
+    "eslint": "^4.18.2",
     "istanbul": "^0.4.5",
     "jasmine": "^2.5.2",
     "jasmine-diff": "^0.1.2"