message: fix: typo in tracekit.ts
  See:
diff: @@ -462,7 +462,7 @@ TraceKit.report = (function reportModuleWrapper() {
  */
  function uninstallGlobalUnhandledRejectionHandler() {
  if (_onUnhandledRejectionHandlerInstalled) {
  - window.onerror = _oldOnunhandledrejectionHandler;
  + window.onunhandledrejection = _oldOnunhandledrejectionHandler;
  _onUnhandledRejectionHandlerInstalled = false;
  }
  }
  