Drop support for React 0.13

[gaearon]

We won't do this yet, but React 0.14 makes everything simpler for us.
When it's out, releasing this will be a breaking change.

Changes:

• No more support for function inside <Provider>, as we have parent context in 0.14
• No more jumping through hoops to support React Native: we can still import React from 'react'
• We can put react in peerDependencies now because it will work for React Native, and also won't cause “duplicate React” issues
• With React Native 0.10, we can rely on process.env.NODE_ENV polyfill being there

Checklist:

• Drop support for React 0.13 in a branch
• Wait for React 0.14
• Wait for React Native 0.10 (will it use 0.14?)
• Update the docs
• Merge and release as a breaking change

[gnoff]

What is the impetus from switching for a creator pattern to directly exporting the two components?

[gaearon]

What is the impetus from switching for a creator pattern to directly exporting the two components?

The reason a factory was added in the first place is because we either needed React from react or from react-native, depending on what user wanted, and couldn't express this statically. With 0.14 we can just use react because react-native will just be a renderer like react-dom, and won't contain Component, PropTypes, etc.

[gaearon]

Updated this.

[cwbutler]

Still waiting on React Native?

[gaearon]

Not really—we'll just ask RN users to stay on previous major. I'll release this soon.