Bump eslint from 4.4.1 to 4.19.1

Bumps [eslint](https://github.com/eslint/eslint) from 4.4.1 to 4.19.1.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v4.4.1...v4.19.1)

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

package.json

@@ -53,7 +53,7 @@
     "benchmark": "2.1.4",
     "chai": "4.1.1",
     "codecov.io": "0.1.6",
-    "eslint": "4.4.1",
+    "eslint": "4.19.1",
     "eslint-config-airbnb-base": "11.3.1",
     "eslint-plugin-import": "2.7.0",
     "istanbul": "1.1.0-alpha.1",