Update react monorepo to v16.12.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
react (source)	devDependencies	minor	16.8.6 -> 16.12.0
react-dom (source)	devDependencies	minor	16.8.6 -> 16.12.0
react-test-renderer (source)	devDependencies	minor	16.8.6 -> 16.12.0

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Release Notes

facebook/react

v16.12.0

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React DOM

• Fix passive effects (useEffect) not being fired in a multi-root app. (@​acdlite in #​17347)

React Is

• Fix lazy and memo types considered elements instead of components (@​bvaughn in #​17278)

v16.11.0

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React DOM

• Fix mouseenter handlers from firing twice inside nested React containers. @​yuanoook in #​16928
• Remove unstable_createRoot and unstable_createSyncRoot experimental APIs. (These are available in the Experimental channel as createRoot and createSyncRoot.) (@​acdlite in #​17088)

v16.10.2

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React DOM

• Fix regression in react-native-web by restoring order of arguments in event plugin extractors (@​necolas in #​16978)

v16.10.1

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React DOM

• Fix regression in Next.js apps by allowing Suspense mismatch during hydration to silently proceed (@​sebmarkbage in #​16943)

v16.10.0

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React DOM

• Fix edge case where a hook update wasn't being memoized. (@​sebmarkbage in #​16359)
• Fix heuristic for determining when to hydrate, so we don't incorrectly hydrate during an update. (@​sebmarkbage in #​16739)
• Clear additional fiber fields during unmount to save memory. (@​trueadm in #​16807)
• Fix bug with required text fields in Firefox. (@​halvves in #​16578)
• Prefer Object.is instead of inline polyfill, when available. (@​ku8ar in #​16212)
• Fix bug when mixing Suspense and error handling. (@​acdlite in #​16801)

Scheduler (Experimental)

• Improve queue performance by switching its internal data structure to a min binary heap. (@​acdlite in #​16245)
• Use postMessage loop with short intervals instead of attempting to align to frame boundaries with requestAnimationFrame. (@​acdlite in #​16214)

useSubscription

• Avoid tearing issue when a mutation happens and the previous update is still in progress. (@​bvaughn in #​16623)

v16.9.0

Compare Source

React

• Add <React.Profiler> API for gathering performance measurements programmatically. (@​bvaughn in #​15172)
• Remove unstable_ConcurrentMode in favor of unstable_createRoot. (@​acdlite in #​15532)

React DOM

• Deprecate old names for the UNSAFE_* lifecycle methods. (@​bvaughn in #​15186 and @​threepointone in #​16103)
• Deprecate javascript: URLs as a common attack surface. (@​sebmarkbage in #​15047)
• Deprecate uncommon "module pattern" (factory) components. (@​sebmarkbage in #​15145)
• Add support for the disablePictureInPicture attribute on <video>. (@​eek in #​15334)
• Add support for onLoad event for <embed>. (@​cherniavskii in #​15614)
• Add support for editing useState state from DevTools. (@​bvaughn in #​14906)
• Add support for toggling Suspense from DevTools. (@​gaearon in #​15232)
• Warn when setState is called from useEffect, creating a loop. (@​gaearon in #​15180)
• Fix a memory leak. (@​paulshen in #​16115)
• Fix a crash inside findDOMNode for components wrapped in <Suspense>. (@​acdlite in #​15312)
• Fix pending effects from being flushed too late. (@​acdlite in #​15650)
• Fix incorrect argument order in a warning message. (@​brickspert in #​15345)
• Fix hiding Suspense fallback nodes when there is an !important style. (@​acdlite in #​15861 and #​15882)
• Slightly improve hydration performance. (@​bmeurer in #​15998)

React DOM Server

• Fix incorrect output for camelCase custom CSS property names. (@​bedakb in #​16167)

React Test Utilities and Test Renderer

• Add act(async () => ...) for testing asynchronous state updates. (@​threepointone in #​14853)
• Add support for nesting act from different renderers. (@​threepointone in #​16039 and #​16042)
• Warn in Strict Mode if effects are scheduled outside an act() call. (@​threepointone in #​15763 and #​16041)
• Warn when using act from the wrong renderer. (@​threepointone in #​15756)

ESLint Plugin: React Hooks

• Report Hook calls at the top level as a violation. (gaearon in #​16455)

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