Upgrade to mocha 12.0.0-beta-9.4

Author: GrahamCampbell

package.json

@@ -55,7 +55,7 @@
     "eslint-plugin-n": "^17.24.0",
     "git-list-updated": "^1.2.1",
     "globals": "^17.5.0",
-    "mocha": "12.0.0-beta-9.2",
+    "mocha": "12.0.0-beta-9.4",
     "prettier": "^3.8.3",
     "proxyquire": "^2.1.3",
     "sinon": "^21.1.2",