Update dependency eslint-plugin-ghost to v3

Author: renovate[bot]

package.json

@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "eslint": "7.32.0",
-    "eslint-plugin-ghost": "2.11.0",
+    "eslint-plugin-ghost": "3.4.3",
     "mocha": "8.4.0",
     "should": "13.2.3",
     "sinon": "11.1.2"