Update react to version 15.2.0 🚀

Hello lovely humans,

react just published its new version 15.2.0.

State	Update :rocket:
Dependency	react
New version	15.2.0
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 error codes to production invariants, with links to the view the full error text. (@keyanzhang in #6948)
Include component stack information in PropType validation warnings. (@spicyj in #6771)
Include component stack information in key warnings. (@keyanzhang in #6799)
Stop validating props at mount time, only validate at element creation. (@keyanzhang in #6823)
New invariant providing actionable error in missing instance case. (@yungsters in #6990)
Add React.PropTypes.symbol to support ES2015 Symbols as props. (@puradox in #6377)
Fix incorrect coercion of ref or key that are undefined in development (@gaearon in #6880)
Fix a false positive when passing other element’s props to cloneElement (@ericmatthys in #6268)

React DOM

Add warning for unknown properties on DOM elements. (@jimfb in #6800, @gm758 in #7152)
Properly remove attributes from custom elements. (@grassator in #6748)
Fix invalid unicode escape in attribute name regular expression. (@nbjahan in #6772)
Add onLoad handling to <link> element. (@roderickhsiao in #6815)
Add onError handling to <source> element. (@wadahiro in #6941)
Handle value and defaultValue more accurately in the DOM. (@jimfb in #6406)
Fix events issue in environments with mutated Object.prototype. (@Weizenlol in #6886)
Fix issue where is="null" ended up in the DOM in Firefox. (@darobin in #6896)
Improved performance of text escaping by using escape-html. (@aickin in #6862)
Fix issue with dangerouslySetInnerHTML and SVG in Internet Explorer. (@joshhunt in #6982)
Fix issue with <textarea> placeholders. (@jimfb in #7002)
Fix controlled vs uncontrolled detection of <input type="radio"/>. (@jimfb in #7003)
Improve performance of updating text content. (@trueadm in #7005)
Ensure controlled <select> components behave the same on initial render as they do on updates. (@yiminghe in #5362)

React Perf Add-on

Add isRunning() API. (@nfcampos in #6763)
Improve accuracy of lifecycle hook timing. (@gaearon in #6858)
Fix internal errors when using ReactPerf with portal components. (@gaearon in #6860)
Fix performance regression. (@spicyj in #6770)
Add warning that ReactPerf is not enabled in production. (@sashashakun in #6884)

React CSSTransitionGroup Add-on

Fix timing issue with null node. (@keyanzhang in #6958)

React Native Renderer

Dependencies on React Native modules use CommonJS requires instead of providesModule. (@davidaurelio in #6715)

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CureApp / faster-titanium