new React Context API (16.3)

[pixelass]

Issue description

React 16.3 offers a new API for Context.
Please investigate how this can help handle context in Dekk.

More info: https://medium.com/dailyjs/reacts-%EF%B8%8F-new-context-api-70c9fe01596b

Versions

• dekk: 1.0.0-4

[pixelass]

I tested the API in a different project and am confident that it will remove a lot of complexity from the internal context/state model.

Let's get this done with or without breaking changes.