Downgrade chai to maintain umd support

Author: Caligatio

package-lock.json

@@ -112,7 +112,7 @@
     "@types/mocha": "^10.0.10",
     "@types/rewire": "^2.5.30",
     "@types/sinon": "^21.0.1",
-    "chai": "^6.2.2",
+    "chai": "^4.5.0",
     "eslint": "^10.5.0",
     "husky": "^9.1.7",
     "karma": "^6.4.4",