Update dependency mocha to v12 (#562)

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

Author: renovate[bot]

package.json

@@ -54,7 +54,7 @@
     "@types/node": "24.13.3",
     "assert": "2.1.0",
     "async-test-util": "2.5.0",
-    "mocha": "11.8.0",
+    "mocha": "12.0.0",
     "rimraf": "3.0.2",
     "tslint": "6.1.3",
     "typescript": "5.5.4"