Vue3 component with TypeScript and vue-property-decorator:

<template lang="pug">

component.OverflowSafeSingleLineLabel(
  :is="rootElementTag"
)
  span.OverflowSafeSingleLineLabel-TextWithIncreasedLineHeight
    slot

</template>


<script lang="ts">

  import { Options, Vue, Prop as VueProperty } from "vue-property-decorator";


  @Options ({})
  export default class OverflowSafeSingleLineLabel extends Vue {

    @Prop({ type: String, default: "div" })
    protected readonly rootElementTag!: string;
  }

</script>

I have 4 TypeScript errors:

ERROR in C:\Users\XXX\Source\OverflowSafeSingleLineLabel.vue.ts
5:45-51
[tsl] ERROR in C:\Users\XXX\Source\OverflowSafeSingleLineLabel.vue.ts(5,46)
      TS6133: '$props' is declared but its value is never read.

ERROR in C:\Users\XXX\Source\OverflowSafeSingleLineLabel.vue.ts
5:57-63
[tsl] ERROR in C:\Users\XXX\Source\OverflowSafeSingleLineLabel.vue.ts(5,58)
      TS6133: '$setup' is declared but its value is never read.

ERROR in C:\Users\XXX\Source\OverflowSafeSingleLineLabel.vue.ts
5:69-74
[tsl] ERROR in C:\Users\XXX\Source\OverflowSafeSingleLineLabel.vue.ts(5,70)
      TS6133: '$data' is declared but its value is never read.

ERROR in C:\Users\XXX\Source\OverflowSafeSingleLineLabel.vue.ts
5:80-88
[tsl] ERROR in C:\Users\XXX\Source\OverflowSafeSingleLineLabel.vue.ts(5,81)
      TS6133: '$options' is declared but its value is never read.

I can't understand on what the error refers for. The line 5 is the template part. Where I declared '$props', '$setup', 'data' and '$options'?

📁 Repro repository (Well, it's not the repro, but currently there nothing except basic scaffold like package.json, Webpack config and 2 source files).

📁 ZIP with included node_modules Just run webpack to get the above erroneous output.