Update react monorepo to v16.9.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
react (source)	devDependencies	minor	16.8.6 -> 16.9.0
react-dom (source)	devDependencies	minor	16.8.6 -> 16.9.0
react-test-renderer (source)	devDependencies	minor	16.8.6 -> 16.9.0

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Release Notes

facebook/react

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)

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