chore: pin eslint-plugin

Author: Marsup

package.json

@@ -27,7 +27,7 @@
   },
   "devDependencies": {
     "@hapi/code": "^9.0.3",
-    "@hapi/eslint-plugin": "*",
+    "@hapi/eslint-plugin": "^6.0.0",
     "@hapi/hapi": "^21.2.1",
     "@hapi/lab": "^25.1.2",
     "@hapi/vision": "^7.0.1",