chore(deps): update dependency which to v6 (#127)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -46,7 +46,7 @@
     "mocha": "^11.0.0",
     "nyc": "^17.0.0",
     "prettier": "^3.1.0",
-    "which": "^4.0.0"
+    "which": "^6.0.0"
   },
   "engines": {
     "node": ">=12.0.0"