Bump eslint from 5.16.0 to 6.5.1

Bumps [eslint](https://github.com/eslint/eslint) from 5.16.0 to 6.5.1.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v5.16.0...v6.5.1)

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

package.json

@@ -24,7 +24,7 @@
     "@types/http-errors": "^1.6.1",
     "browserify": "^16.2.3",
     "documentation": "^9.1.1",
-    "eslint": "^5.14.0",
+    "eslint": "^6.5.1",
     "in-publish": "^2.0.0",
     "jest": "^24.1.0",
     "localstorage-memory": "^1.0.3",