Require PHP8.1 in all repos & bedrocks

[SteelWagstaff]

Create new releases of our plugins & themes which require PHP8.1. When we do this, look for ways to improve and make it easier to bump PHP versions in the future.

Notes

For each repo, we should:

1. Update PHP compatibility rule in phpcs.ruleset.xml
2. Update PHP requirement in composer.json and run composer update -W
3. Add PHP 8.2 to CI pipelines and set PHP 8.1 & WordPress 6.1.1 as non-experimental matrix combination

Repos that need to be updated:

Plugins

• [x] Pressbooks https://github.com/pressbooks/pressbooks/releases/
• [x] Excalibur https://github.com/pressbooks/excalibur/releases/
• [x] Pressbooks BISAC https://github.com/pressbooks/pressbooks-bisac/releases/
• [x] Pressbooks CAS SSO https://github.com/pressbooks/pressbooks-cas-sso/releases
• [x] Pressbooks eCampusOntario https://github.com/pressbooks/pressbooks-ecampus-ontario/releases
• [x] Pressbooks LTI Provider 1.3 https://github.com/pressbooks/pressbooks-lti-provider-1p3/releases
• [x] Pressbooks Network Analytics https://github.com/pressbooks/pressbooks-network-analytics/releases
• [x] Pressbooks Network Catalog https://github.com/pressbooks/pressbooks-network-catalog/releases
• [x] Pressbooks OIDC SSO https://github.com/pressbooks/pressbooks-oidc-sso/releases
• [x] Pressbooks Plugins Config: https://github.com/pressbooks/pressbooks-plugins-config/releases/
• [x] Pressbooks SAML SSO https://github.com/pressbooks/pressbooks-saml-sso/releases
• [x] Pressbooks Stats https://github.com/pressbooks/pressbooks-stats/releases
• [x] Pressbooks Whitelabel https://github.com/pressbooks/pressbooks-whitelabel/releases
• [x] Pressbooks Auth https://github.com/pressbooks/pressbooks-auth/releases/
• [x] Pressbooks VIP https://github.com/pressbooks/pressbooks-vip/releases/
• [x] Pressbooks selfe https://github.com/pressbooks/pressbooks-selfe/releases/
• [x] Pressbooks Biblioboard OAuth https://github.com/pressbooks/pressbooks-biblioboard-oauth/releases
• [x] Pressbooks Client Marketing https://github.com/pressbooks/pressbooks-client-marketing/releases

Themes

• [x] Pressbooks-book https://github.com/pressbooks/pressbooks-book/releases
• [x] Aldine https://github.com/pressbooks/pressbooks-aldine/releases/
• [x] Pressbooks Librarian https://github.com/pressbooks/pressbooks-librarian/releases

Other

• [x] PB CLI https://github.com/pressbooks/pb-cli/releases

Bedrocks

• [x] pressbooksedu-golden-bedrock
• [x] pressbookspublic-bedrock
• [x] pressbookspub-bedrock
• [x] client-bedrock
• [x] wisc-bedrock

After we make these changes, we will no longer guarantee support for PHP 8.0.

[richard015ar]

Included in the sizing is an improvement to centralize / simplify the php version changing process