Update typescript requirement from 3.1.6 to 3.2.2 (#3585)

Updates the requirements on [typescript](https://github.com/Microsoft/TypeScript) to permit the latest version.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/commits/v3.2.2

)

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