This adds the `engines` field to the `package.json` file for the three default themes with build processes in order to encourage consistent tooling for contributors.
Some minor dependency updates for these themes are also included in this change.
Props jorbin, joemcgill, swissspidy.
See #59663.
Built from https://develop.svn.wordpress.org/trunk@57213
git-svn-id: http://core.svn.wordpress.org/trunk@56719 1a063a9b-81f0-0310-95a4-ce76da25c4cd