Use ArrayAdapter in debug mode

[rixafy]

[rixafy]

I just realized, this might be a BC break, if someone uses custom nettrine.cache.driver in their neon config (because composer update can use version 2.0 and that version have no longer cache classes - doctrine switched to symfony cache adapters), so I'll edit composer.json to remove support for 2.0, so next release can be patch to 0.4 and when releasing 0.5 we can just use cache 2.0 as dependency and remove code for supporting older version.