2.7.3: fix DBAL deprecation, test PHP 8.3 and Symfony 7, add docker-compose for DX, and more

What's Changed

• [Feature]: Add docker setup and an updated README for people who want to contribute by @sven-ahrens in #260
• chore: fix installation of mysqldump on CI by @alexislefebvre in #262
• chore: bump gh action "actions/cache" 3 => 4 by @Chris53897 in #263
• chore: add testrun for php 8.3 for symfony 7 by @Chris53897 in #264
• tests: remove legacy code for "theofidry/alice-data-fixtures" by @Chris53897 in #267
• feat: fix dbal deprecation for connection by @Chris53897 in #268

New Contributors

• @sven-ahrens made their first contribution in #260

Full Changelog: 2.7.2...2.7.3