Editor: update npm packages for 6.4.2.
Package updates with bug fixes related to patterns, Query look interactivity, design tools UI and accessibility.
Props mikachan, jorbin, kebbet, artemiosans, talldanwp, ramonopoly, alexstine, andrewserong, mamaduka, cbravobernal, ajlende, luisherranz.
See #59828.
Built from https://develop.svn.wordpress.org/trunk@57109
git-svn-id: http://core.svn.wordpress.org/trunk@56620 1a063a9b-81f0-0310-95a4-ce76da25c4cd