Sourced from react's releases.

16.9.0 (August 8, 2019)

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)

Artifacts

• react: https://unpkg.com/react@16.9.0/umd/
• react-art: https://unpkg.com/react-art@16.9.0/umd/
• react-dom: https://unpkg.com/react-dom@16.9.0/umd/
• react-is: https://unpkg.com/react-is@16.9.0/umd/
• react-test-renderer: https://unpkg.com/react-test-renderer@16.9.0/umd/
• scheduler: https://unpkg.com/scheduler@0.15.0/umd/

v16.9.0-rc.0

This is a release candidate for React v16.9.0.

Changelog is available in https://github-redirect.dependabot.com/facebook/react/pull/16254.

UMD builds

• react: https://unpkg.com/react@16.9.0-rc.0/umd/

... (truncated)

Sourced from react's changelog.

16.9.0 (August 8, 2019)

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)

• c4c9f08 BugFix: Suspense priority warning firing when not supposed to (#16256)
• 4279455 [Flare] Tweaks to Flare system design and API (#16264)
• 121bfb0 update legacy context warning message (#16196)
• 9ae5e38 Add guard to ensure Profiler onRender prop is function before calling (#16197)
• 06cc996 Edit Suspense Priority Warning Message (#16186)
• 5098891 [Flare] Redesign core event system (#16163)
• 03944bf Update Suspense Priority Warning to Include Component that Triggered Update (...
• 2c4d61e Adds experimental fundamental interface (#16049)
• d9b4c55 unify deprecated/unsafe lifecycle warnings, pass tests (#16103)
• 8d413bf Remove React.error and React.warn (#16126)
• Additional commits viewable in compare view

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
• @dependabot badge me will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in the .dependabot/config.yml file in this repo:

• Update frequency (including time of day and day of week)
• Automerge options (never/patch/minor, and dev/runtime dependencies)
• Pull request limits (per update run and/or open at any time)
• Out-of-range updates (receive only lockfile updates, if desired)
• Security updates (receive only security updates, if desired)

Finally, you can contact us by mentioning @dependabot.