Compatibility with Symfony 6

[prudloff-insite]

This library can not be used with Symfony 6:

yosymfony/resource-watcher v3.0.0 requires symfony/finder ^2.7|^3.0|^4.0|^5.0 -> found symfony/finder[v2.7.0, ..., v2.8.52, v3.0.0, ..., v3.4.47, v4.0.0, ..., v4.4.44, v5.0.0, ..., v5.4.27] but the package is fixed to v6.3.5 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command.

[prudloff-insite]

I see there is already a MR for this: https://github.com/yosymfony/resource-watcher/pull/12