Fix ResolveInfo import to be compatible with Graphene 3.x

[jmp]

Fixes #35 by importing ResultInfo from graphene instead of graphql.

This should be compatible with both Graphene 2.x and 3.x.

[redzej]

Hello @jmp, thanks for PR. There was error when i run test check on this code, but i think it is the problem is with test itself - i need to run it locally (and fix). Commit looks ok. I will approve after i fix test case and re-run github check.

[jmp]

Thanks for taking a look, @redzej!

I believe the problem with the tests is the current requirements.txt:

• graphene will install Graphene 3.0
• graphene-python will install Graphene-Django 2.15.0 which is not compatible with Graphene 3.0.

One solution would be to remove the graphene dependency from requirements.txt. I guess it shouldn't be needed because graphene-django already depends on it. Or, pin it to Graphene 2.x.

Other option would be to allow pre-release versions of graphene-django (e.g. Graphene-Django 3.0.0b7) as those support Graphene 3.0.

[redzej]

Sorry for the delay. I am going to fix problem with failing github check today and approve this PR.

[gustav0]

@redzej any updates on this? Anything I can help you with?