Fix enums converting

[deknowny]

There was a bug with enums because you return enum.Enum instead of sqlalchemy.Enum when resolve an enum field

[bschoenmaeckers]

duplicate of #165

[deknowny]

oh, okay, but still not merged

[deknowny]

@tiangolo do you know about the problem?

0.0.6 is released without any of these enums fixes

[tiangolo]

Thank you @deknowny! 🍰

And thanks everyone for the discussion. ☕

This was solved in #165 that included tests, so I'll close this one. The fix will be available in the next release, SQLModel 0.0.7, in the next hours. 🎉

Thanks for the effort! ☕