Fix react-error-overlay lint issue

Author: Morten N.O. Henriksen

packages/react-error-overlay/src/index.js

@@ -15,7 +15,7 @@ import { applyStyles } from './utils/dom/css';
 // Importing iframe-bundle generated in the pre build step as
 // a text using webpack raw-loader. See webpack.config.js file.
 // $FlowFixMe
-import iframeScript from 'iframeScript';
+import iframeScript from './iframeScript';
 
 import type { ErrorRecord } from './listenToRuntimeErrors';
 import type { ErrorLocation } from './utils/parseCompileError';