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

Author: renovate[bot]

package.json

@@ -56,7 +56,7 @@
     "@betterer/regexp": "5.4.0",
     "@betterer/typescript": "5.4.0",
     "@shelf/esbuild-config": "0.1.2",
-    "@shelf/eslint-config": "2.29.0",
+    "@shelf/eslint-config": "6.1.1",
     "@shelf/prettier-config": "1.0.0",
     "@shelf/tsconfig": "0.0.11",
     "@types/node": "16",