build(deps-dev): bump eslint from 5.16.0 to 6.6.0

Bumps [eslint](https://github.com/eslint/eslint) from 5.16.0 to 6.6.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v5.16.0...v6.6.0)

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

Author: dependabot-preview[bot]

package.json

@@ -25,7 +25,7 @@
     "@babel/core": "^7.7.2",
     "@babel/runtime": "^7.7.2",
     "babel-preset-airbnb": "^4.1.0",
-    "eslint": "^5.14.1",
+    "eslint": "^6.6.0",
     "eslint-config-airbnb-base": "^14.0.0",
     "eslint-plugin-import": "^2.16.0"
   },