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

@@ -39,7 +39,7 @@
   "devDependencies": {
     "@feathersjs/express": "^4.3.0-pre.1",
     "@feathersjs/feathers": "^4.3.0-pre.1",
-    "eslint": "^5.16.0",
+    "eslint": "^6.5.1",
     "feathers-nedb": "^4.0.2",
     "mocha": "^6.1.4",
     "nedb": "^1.8.0",