SHC Wordpress Beta/RC Tester

SHC Wordpress Beta/RC Tester # Limit core updates to next Beta/RC release if currently running a Beta/RC release Description ## The WP Core Update API allows a site to update to nightlies from either trunk or the latest branch (i.e., minor version). The WordPress Beta Tester plugin allows a site admin to control which of those nightlies will be updated to. However, that API does not allow updating to, what I call, "named" beta/RC releases (e.g., 5.3-beta2, 5.3-RC1, etc; as opposed to a nightly build, e.g., 5.3-beta2-[commit #]). Once I install a beta/RC release on a site, I would rather that site not be updated (either via auto-updates or manually) to nightlies. This plugin accomplishes that. It would be great if the WP Core Update API had 'beta/RC' offers so that one could use an updated version of the WordPress Beta Tester plugin to acheive this, but until that happens (which isn't likely), this plugin is useful to me. This plugin can be used in conjuction with Wo