What's Changed

• Added PHP 8 support; dropped Travis and Coveralls; use Github Actions from now on by @k00ni in https://github.com/semsol/arc2/pull/145
• Huge cleanup (PHP 8 only; prep. for long term support) by @k00ni in https://github.com/semsol/arc2/pull/151

Details about #151

1. :exclamation: Default table engine changed from MyISAM to InnoDB
2. Fixed a lot of deprecation warnings in PHP 8.2 (mostly dynamic property usage and deprecated utf8_* usage)
3. Removed the following DB adapters: mysqli, PDO-sqlite:
   • mysqli adapter was kept for compatibility reasons, has known problems with MySQL 8.0.
   • PDO SQLite was removed because it was buggy and it didn't pass our tests.
   • also removed CachedAdapter
4. Removed methods:
   • ARC2_Class::queryDB(...), because it relied on outdated mysqli usage.
   • AbstractAdapter + PDOAdapter: getServerInfo(); changed getServerVersion() to use SQL select version() to get DB server version
5. Cleaned require- and require-dev section in composer.json. For instance, removed symfony/cache.
6. Upgraded Dockerfile to use PHP 8.2
7. Field db_con in ARC2 configuration was removed. It used to hold the mysqli connection.
8. Deployed PHP-CS-Fixer to the whole code base to improve readability.
9. Updated our Github workflows to use newer DB versions (such as MariaDB 10.5+)
10. Salvaged a fix from @craigdietrich: fixes #133 and fixes #135

Full Changelog: https://github.com/semsol/arc2/compare/2.5.1...3.0.0