Support Symfony 6.3

What's Changed

• chore: add travis ci tests for php 8.2 by @Chris53897 in #56
• chore: replace travis with github actions, drop support of php7, by @Chris53897 in #57
• docs: improve docs, use php 8 level features by @Chris53897 in #59
• Feature/php8 perf by @Chris53897 in #58

New Contributors

• @Chris53897 made their first contribution in #56

Full Changelog: v1.2.3...v1.2.4