[TypeScript] Use only typings in petstore sample

[cbornet]

As TSD is deprecated : see DefinitelyTyped/tsd#269

[wing328]

@cbornet would you have cycle to contribute a PR to update that?

[cbornet]

@Vrolijkx it seems still present in typescript-angular sample. Would you have a look ?

[kenisteward]

The current new way to import types is now to use @types scope on npm instead of typings as of TypeScript 2.0 https://blogs.msdn.microsoft.com/typescript/2016/06/15/the-future-of-declaration-files/. If types are needed the clients should be updated to use this.

[wing328]

@kenisteward thanks for the sharing the link. Let me know if you've time to contribute the enhancement using @types

[Vrolijkx]

@cbornet I think it's better to go directly to the @types like @kenisteward suggests

[kenisteward]

My only thing is it breaks some things possibly because I think there is a UMD discrepancy

[cbornet]

@Vrolijkx agreed. Maybe close this issue and open a new one.