Drupal 10 compatibility

Ignore #2, it contains another patch.
Use this one instead :)

+++ b/src/MimeDetectService.php
@@ -22,7 +22,7 @@ class MimeDetectService implements MimeDetectServiceInterface {
+   * @var \Symfony\Component\Mime\MimeTypesInterface

You advert that the MIME type guesser class in symfony >= 4.3 has changed, but MimeTypesInterface is a different interface.

It was moved to \Symfony\Component\Mime\MimeTypeGuesserInterface and removed from its original location in Symfony 5.0 and their methods renamed.

Patch reviewed accordingly.

Good spot. Looks good. We've been using patch 4 in production on some high traffic sites for a few weeks now without any issue.

I've updated the MR to declare support for D11, as upgrade status was reporting that everything was compatible with no further changes required. I've hidden the patch files for clarity, the latest code is in the MR.