Bump eslint from 5.16.0 to 6.8.0

Bumps [eslint](https://github.com/eslint/eslint) from 5.16.0 to 6.8.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v5.16.0...v6.8.0)

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

package.json

@@ -69,7 +69,7 @@
   },
   "devDependencies": {
     "concurrently": "^5.0.2",
-    "eslint": "^5.15.1",
+    "eslint": "^6.8.0",
     "eslint-config-airbnb-base": "^14.0.0",
     "eslint-plugin-import": "^2.20.0",
     "istanbul": "^0.4.0",