The announcement was officially made by
For the complete details on how TypeScript 2.0 works be sure to head over to Daniel Rosenwasser's official post. To download TypeScript 2.0, however, you must update TypeScript 2.0 for Visual Studio 2015 with Update 3. To grab it with NuGet, start using TypeScript 2.0 in Visual Studio Code. For, Visual Studio “15” Preview users, however, TypeScript 2.0 will be included in the next Preview release.