Update react monorepo to ^16.8.6

Created by: renovate[bot]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
react	dependencies	patch	^16.8.6	homepage, source
react	dependencies	minor	^16.8.6	homepage, source
react-dom	dependencies	patch	^16.8.6	homepage, source
react-test-renderer	devDependencies	minor	^16.8.6	homepage, source

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Release Notes

facebook/react

v16.8.6

Compare Source

React DOM

• Fix an incorrect bailout in useReducer(). (@​acdlite in #​15124)
• Fix iframe warnings in Safari DevTools. (@​renanvalentin in #​15099)
• Warn if contextType is set to Context.Consumer instead of Context. (@​aweary in #​14831)
• Warn if contextType is set to invalid values. (@​gaearon in #​15142)

v16.8.5

Compare Source

React DOM

• Don't set the first option as selected in select tag with size attribute. (@​kulek1 in #​14242)
• Improve the useEffect(async () => ...) warning message. (@​gaearon in #​15118)
• Improve the error message sometimes caused by duplicate React. (@​jaredpalmer in #​15139)

React DOM Server

• Improve the useLayoutEffect warning message when server rendering. (@​gaearon in #​15158)

React Shallow Renderer

• Fix setState in shallow renderer to work with Hooks. (@​gaearon in #​15120)
• Fix shallow renderer to support React.memo. (@​aweary in #​14816)
• Fix shallow renderer to support Hooks inside forwardRef. (@​eps1lon in #​15100)

v16.8.4

Compare Source

React DOM and other renderers

• Fix a bug where DevTools caused a runtime error when inspecting a component that used a useContext hook. (@​bvaughn in #​14940)

v16.8.3

Compare Source

React DOM

• Fix a bug that caused inputs to behave incorrectly in UMD builds. (@​gaearon in #​14914)
• Fix a bug that caused render phase updates to be discarded. (@​gaearon in #​14852)

React DOM Server

• Unwind the context stack when a stream is destroyed without completing, to prevent incorrect values during a subsequent render. (@​overlookmotel in #​14706)

ESLint Plugin for React Hooks

• Add a new recommended exhaustive-deps rule. (@​gaearon in #​14636)

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