ci: Add tests for registry

[fsbraun]

No description provided.

[codecov-commenter]

Codecov Report

Merging #5 (a0db044) into master (f68b081) will increase coverage by 1.40%.
The diff coverage is n/a.

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@@            Coverage Diff             @@
##           master       #5      +/-   ##
==========================================
+ Coverage   62.22%   63.62%   +1.40%     
==========================================
  Files          21       21              
  Lines        1350     1350              
  Branches      211      211              
==========================================
+ Hits          840      859      +19     
+ Misses        470      451      -19     
  Partials       40       40              

Impacted Files	Coverage Δ
djangocms_form_builder/forms.py	77.65% <0.00%> (+3.35%)	⬆️
djangocms_form_builder/actions.py	57.89% <0.00%> (+3.50%)	⬆️
djangocms_form_builder/__init__.py	90.90% <0.00%> (+50.00%)	⬆️

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