[Vendor] Update Doctrine extensions

[Guite]

• https://github.com/doctrine-extensions/DoctrineExtensions/releases/tag/v3.0.0
  • https://github.com/doctrine-extensions/DoctrineExtensions/pull/2174/files
  • https://github.com/doctrine-extensions/DoctrineExtensions/releases/tag/v3.0.3
• https://github.com/stof/StofDoctrineExtensionsBundle/releases/tag/v1.5.0
• antishov/StofDoctrineExtensionsBundle#22
• stof/StofDoctrineExtensionsBundle#422 (comment)

[craigh]

we aren't using stof's branch we are using a different branch
https://github.com/zikula/core/blob/master/composer.lock#L10

I'm not sure we should switch back to the original branch.

[Guite]

I will observe both for a while I think.