Update react to version 15.3.0 🚀

Hello lovely humans,

react just published its new version 15.3.0.

State	Update :rocket:
Dependency	react
New version	15.3.0
Type	devDependency

This version is not covered by your current version range.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of react. Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

Do you have any ideas how I could improve these pull requests? Did I report anything you think isn’t right? Are you unsure about how things are supposed to work?

There is a collection of frequently asked questions and while I’m just a bot, there is a group of people who are happy to teach me new things. Let them know.

Good luck with your project :sparkles:

You rock!

:palm_tree:

GitHub Release

React

Add React.PureComponent - a new base class to extend, replacing react-addons-pure-render-mixin now that mixins don't work with ES2015 classes. (@spicyj in #7195)
Add new warning when modifying this.props.children. (@jimfb in #7001)
Fixed issue with ref resolution order. (@gaearon in #7101)
Warn when mixin is undefined. (@swaroopsm in #6158)
Downgrade "unexpected batch number" invariant to a warning. (@spicyj in #7133)
Validate arguments to oneOf and oneOfType PropTypes sooner. (@troydemonbreun in #6316)
Warn when calling PropTypes directly. (@Aweary in #7132, #7194)
Improve warning when using Maps as children. (@keyanzhang in #7260)
Add additional type information to the PropTypes.element warning. (@alexzherdev in #7319)
Improve component identification in no-op setState warning. (@keyanzhang in #7326)

React DOM

Fix issue with nested server rendering. (@Aweary in #7033)
Add xmlns, xmlnsXlink to supported SVG attributes. (@salzhrani in #6471)
Add referrerPolicy to supported HTML attributes. (@Aweary in #7274)
Fix issue resulting in <input type="range"> initial value being rounded. (@troydemonbreun in #7251)

React Test Renderer

Initial public release of package allowing more focused testing. Install with npm install react-test-renderer. (@spicyj in #6944, #7258, @iamdustan in #7362)

React Perf Add-on

Fix issue resulting in excessive warnings when encountering an internal measurement error. (@sassanh in #7299)

React TestUtils Add-on

Implement type property on for events created via TestUtils.Simulate.*. (@yaycmyk in #6154)
Fix crash when running TestUtils with the production build of React. (@gaearon in #7246)

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sam-silv / histoslider