Bump vue-tsc from 1.2.0 to 1.8.4

Bumps [vue-tsc](https://github.com/vuejs/language-tools/tree/HEAD/packages/vue-tsc) from 1.2.0 to 1.8.4.
- [Release notes](https://github.com/vuejs/language-tools/releases)
- [Changelog](https://github.com/vuejs/language-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vuejs/language-tools/commits/v1.8.4/packages/vue-tsc)

---
updated-dependencies:
- dependency-name: vue-tsc
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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