Follow up on https://core.trac.wordpress.org/ticket/49358#comment:12. We should add "warning" to the array of packages with default export to avoid the need for developers to use wp.warning.default. Props gziolo, aduth. Fixes #49436. Built from https://develop.svn.wordpress.org/trunk@47301 git-svn-id: http://core.svn.wordpress.org/trunk@47101 1a063a9b-81f0-0310-95a4-ce76da25c4cd