Symfony5 support

[szymek]

Hi, is possible to support Symfony5?

[yethee]

Hi!

Personally, I don't use this bundle and Symfony as full stack framework in recent years.

I will try to add support Symfony 5, but I'm not very familiar with the latest changes in symfony/form.

[yethee]

Can you check #32 for compat with Symfony 5?

$ composer require yethee/enum-bundle:dev-symfony5