Prepare 4.4.0 release

Merge pull request #329 from KnpLabs/fix/order-by-walker-signature

fix: order by walker signature

Merge pull request #325 from garak/sf7

allow Symfony 7

Merge pull request #321 from garak/improve-code

improve code

Merge pull request #319 from garak/internal-exception

introduce new internal exception

Merge pull request #315 from garak/fix-querysubscriber

check parameter before getting it

prepare release of v4.0.0

prepare release of v3.6.0

Merge pull request #304 from garak/remove-php73

Remove support for php 7.3

Merge pull request #301 from garak/sf6

fix Symfony deps