Bump eslint from 4.11.0 to 6.6.0 in /examples/microservices

Bumps [eslint](https://github.com/eslint/eslint) from 4.11.0 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@v4.11.0...v6.6.0)

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

Author: dependabot[bot]

examples/microservices/package.json

@@ -56,7 +56,7 @@
   "devDependencies": {
     "chai": "4.1.2",
     "chai-as-promised": "7.1.1",
-    "eslint": "4.11.0",
+    "eslint": "6.6.0",
     "eslint-plugin-import": "2.8.0",
     "eslint-plugin-mocha": "4.11.0",
     "eslint-plugin-node": "5.2.1",