title: Vue 3 - Composition Api - Typescript -> type of emit
body: <p>I'm starting with VUE 3 and the composition api using Typescript for the first time.
  I have the setup method like the following:
  <code>setup(props: { widgetType: string; displayType: string; trigger: number }, { emit }) </code>
  Now, when I'm building this file, I get the error &quot;Binding element 'emit' implicitly has an 'any' type.&quot;.
  I do not know how to fix this. I tried different solutions from the web but nothing worked.
  Can anybody help me?
  Regards
  Chris</p>