Wrong error when exporting with context=module in a svelte component

[salvatoreromeo]

If you use a double script tag inside a svelte component, when you import something from the script[contex=module], webstorm says there's an error:

 import JsonViewer, { JsonViewerEvent } from './json-viewer/json-viewer.svelte';
//                                          ^  error here: Cannot resolve symbol 'JsonViewerEvent'

<script lang="ts" context="module">
  export interface JsonViewerEvent {
    expanded: boolean;
  }
</script>

<script lang="ts">

[tomblachut]

Duplicate of #241