Deprecation warnings after upgrading Symfony 4.3.9 to 4.4.1/5.0

Ok, I've been able to fix the following. Feel free to edit this if anyone knows how to fix any of the other ones.

1.) From Cerad in the Comments: Deprecation: Doctrine\ORM\Mapping\UnderscoreNamingStrategy without making it number aware is deprecated

9.) Twig twig.exception_controller configuration option: https://github.com/symfony/symfony/blob/4.4/UPGRADE-4.4.md#twigbundle

2.) The ExceptionListener cleared in when I fixed the above two items, bringing me down to only 5 deprecations

---

Finally the 5 remaining, seem to be known and will be fixed per this: Deprecated classes warnings in Symfony 5.0.1 console on Windows

If you want to get rid of the Doctrine\Common\Persistence\* depreciations until everything is fixed, you can add a "conflict": { "doctrine/persistence": "1.3.*" } to your composer.json and stay with version 1.2.* of doctrine/persistence.