chore(deps-dev): bump typescript from 3.6.4 to 3.8.3

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.6.4 to 3.8.3.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v3.6.4...v3.8.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]