Bump eslint from 3.19.0 to 6.8.0 (#11)

Bumps [eslint](https://github.com/eslint/eslint) from 3.19.0 to 6.8.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v3.19.0...v6.8.0)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -36,7 +36,7 @@
     "winston": "^2.3.1"
   },
   "devDependencies": {
-    "eslint": "^3.19.0",
+    "eslint": "^6.8.0",
     "eslint-config-google": "^0.7.1",
     "nodemon": "^1.18.7"
   }