Add support for fragment spread in interface

[devxoul]

This PR allows to generate code for the graphql below:

query GetNode($id: ID!) {
  node(id: $id) {
    ... on User {
      UserFragment
    }
    ... on Article {
      ArticleFragment
    }
  }
}

by adding base classes to the inline fragment classes:

  class GetNodeNodeUserInlineFragment(
+   UserFragment,
    GetNodeNodeBase
  ):

  class GetNodeNodeArticleInlineFragment(
+   ArticleFragment,   
    GetNodeNodeBase
  ):

[codecov]

Codecov Report

Patch coverage: 33.33% and project coverage change: -0.35 ⚠️

Comparison is base (5b78fa2) 93.88% compared to head (0d30d92) 93.54%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #56      +/-   ##
==========================================
- Coverage   93.88%   93.54%   -0.35%     
==========================================
  Files          56       64       +8     
  Lines        3058     3423     +365     
==========================================
+ Hits         2871     3202     +331     
- Misses        187      221      +34     

Impacted Files	Coverage Δ
turms/recurse.py	85.46% <33.33%> (-2.49%)	⬇️

... and 53 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[jhnnsrs]

Hi,

thanks a lot for updating this! Could i bother you to write a test for this ? :)
Otherwise i can get to it next week ! :)

[jhnnsrs]

Looks good to me! Tests will come later ;) Thanks a lot!