Typescript 2.1 Merge Types

[Kitson Kelly]

Enhancement

Merge types are in master and should be part of TypeScript 2.1 (see: Microsoft/TypeScript#12114). These will allow us to model situations like mixins (assign/deepAssign) and things like our .setState() in Stateful.

This will require changing our state interfaces to something that is not all optional and use the merge typing to model the necessary types.

Package Version: master

[Dylan Schiemann]

Resolved in dojo/interfaces#54 and other work in other tickets.

[Bradley Maier]

@dylans I think there is still some work to be done on compose for this. Specifically using it to check that calls to override, and potentially extends, are valid at design time.