Fix codesandbox#525 for service worker inconsistencies

Author: Ives van Hoorne

packages/app/src/sandbox/eval/tests/jest-lite.js

@@ -371,4 +371,7 @@ export default class TestRunner {
       }
     }
   };
+
+  // We stub this, because old versions of CodeSandbox still needs this
+  reportError = () => {};
 }