Update eslint requirement from 4.19.0 to 4.19.1

Updates the requirements on [eslint](https://github.com/eslint/eslint) to permit the latest version.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v4.19.0...v4.19.1)

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

Author: dependabot-preview[bot]

package.json

@@ -21,7 +21,7 @@
   },
   "devDependencies": {
     "chai": "4.2.0",
-    "eslint": "4.19.0",
+    "eslint": "4.19.1",
     "eslint-config-airbnb-base": "12.1.0",
     "eslint-plugin-import": "2.17.3",
     "mocha": "6.1.4"