Downgrade testdouble to last compatible version

Author: lumaxis

package-lock.json

@@ -118,7 +118,7 @@
 		"eslint": "^8.56.0",
 		"mocha": "^10.2.0",
 		"process": "^0.11.10",
-		"testdouble": "^3.20.1",
+		"testdouble": "^3.20.0",
 		"ts-loader": "^9.5.1",
 		"typescript": "^5.3.3",
 		"webpack": "^5.89.0",