Support for Symfony 8

What's Changed

• Fix php deprecations (fixes #433). by @uncaught in #434
• Remove safe_mode check in curl client by @sunkan in #435
• Add Symfony 8 support by @Griffon-Weglot in #436

New Contributors

• @uncaught made their first contribution in #434
• @Griffon-Weglot made their first contribution in #436

Full Changelog: 1.3.0...1.4.0