Bump eslint from 3.13.1 to 4.18.2

Bumps [eslint](https://github.com/eslint/eslint) from 3.13.1 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@v3.13.1...v4.18.2)

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

package.json

@@ -27,7 +27,7 @@
 	"devDependencies": {
 		"chai": "3.5.0",
 		"coveralls": "2.11.16",
-		"eslint": "3.13.1",
+		"eslint": "4.18.2",
 		"husky": "0.14.3",
 		"istanbul": "0.4.5",
 		"lint-staged": "4.3.0",