chore(deps): update dependency @bjerk/eslint-config to v6

Author: renovate[bot]

package.json

@@ -24,7 +24,7 @@
     "test": "jest"
   },
   "devDependencies": {
-    "@bjerk/eslint-config": "^4.0.0",
+    "@bjerk/eslint-config": "^6.0.0",
     "@cobraz/prettier": "^2.0.1",
     "@google-cloud/firestore": "^6.5.0",
     "@graphql-tools/merge": "^9.0.0",