I have to say, I'm pretty confused about what the state of 2.0 is. There's been no official announcement and the latest stable version on npm is 1.8.10[1]. That being said the latest release on GitHub is 2.0.2, with no official release of 2.0 (or 2.0.1 for that matter) listed anywhere[2]. There's also no active milestone on GitHub for the 2.0 release, but there is for patch versions of 2.0? I'm sure this all just means 2.0 hasn't been released yet, but it's super confusing.
[1]: https://www.npmjs.com/package/typescript
[2]: https://github.com/Microsoft/TypeScript/releases