chore(deps): update dependency eslint-plugin-react to v7.12.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
eslint-plugin-react	devDependencies	patch	7.12.3 -> 7.12.4	source

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Release Notes

yannickcr/eslint-plugin-react

v7.12.4

Compare Source

Fixed

• [no-unused-prop-types][]: avoid a crash (#​2131, @​ljharb)
• [prop-types][]: avoid further crashes from nonexistent nodes in unusedPropTypes (#​2127, @​ljharb)
• [prop-types][]: Read name of callee object (#​2125, @​CrOrc)
• [prop-types][]: Ignore reassignments when matching props declarations with components (#​2051, #​1957, @​yannickcr)
• [prop-types][], [no-unused-prop-types][], [require-default-props][]: Detect components with return statement in switch/case (#​2118, @​yannickcr)

Changed

• [prop-types][], [no-typos][]: add passing test cases (#​2123, #​2128, #​2136, #​2134, @​ljharb)

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[matticbot]

Test live: https://calypso.live/?branch=renovate/eslint-plugin-react-7.x

[jsnajdr]

Dev-only dependency that doesn't change production build. Linter in CI passes 👍