the wpcli tool has the possibility to run a patchlevel update for plugins (--patch):

https://developer.wordpress.org/cli/commands/plugin/update/

It would be very helpful to run the same patchlevelupdate for the themes and the wp core.

There is no parameter for the patchlevelupdate (--patch):

https://developer.wordpress.org/cli/commands/theme/update/
https://developer.wordpress.org/cli/commands/core/update/

It would be also nice, if there a minorlevelupdate for themes (--minor).