Build/Test Tools: Update the `wp-coding-standards/wpcs` package.

This updates the version from 2.1.1 to 2.3.0, the latest version at this time.

Fixes #50258.
Built from https://develop.svn.wordpress.org/trunk@47927


git-svn-id: https://core.svn.wordpress.org/trunk@47701 1a063a9b-81f0-0310-95a4-ce76da25c4cd