build(deps-dev): bump typescript from 4.2.4 to 4.3.4 in /html (#708)

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 4.2.4 to 4.3.4.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/compare/v4.2.4...v4.3.4

)

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

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