Bump eslint from 4.11.0 to 4.18.2 in /intro/server

Bumps [eslint](https://github.com/eslint/eslint) from 4.11.0 to 4.18.2.
- [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/v4.11.0...v4.18.2)

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

intro/server/package.json

@@ -13,7 +13,7 @@
   "author": "",
   "license": "MIT",
   "devDependencies": {
-    "eslint": "4.11.0",
+    "eslint": "4.18.2",
     "jest": "21.2.1",
     "jest-cli": "21.2.1",
     "moleculer-repl": "^0.3.0",