chore(deps-dev): bump eslint from 2.13.1 to 4.18.2 (#397)

Bumps [eslint](https://github.com/eslint/eslint) from 2.13.1 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@v2.13.1...v4.18.2)

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

Author: dependabot[bot]

package-lock.json

@@ -29,7 +29,7 @@
   "license": "MIT",
   "devDependencies": {
     "chai": "^4.2.0",
-    "eslint": "^2.2.0",
+    "eslint": "^4.18.2",
     "eslint-config-standard": "^5.1.0",
     "eslint-plugin-promise": "^1.1.0",
     "eslint-plugin-react": "^4.1.0",