Split request and response components in open api

[nezhar]

Fixes an issue for snypy/snypy-frontend#791

[codecov-commenter]

Codecov Report

Merging #78 (4f51ec4) into master (10ff0be) will increase coverage by 0.22%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #78      +/-   ##
==========================================
+ Coverage   94.00%   94.23%   +0.22%     
==========================================
  Files          59       60       +1     
  Lines        1384     1508     +124     
==========================================
+ Hits         1301     1421     +120     
- Misses         83       87       +4     

Impacted Files	Coverage Δ
snypy/snypy/settings.py	100.00% <ø> (ø)
snypy/snippets/models/models.py	87.64% <0.00%> (-0.36%)	⬇️
snypy/snypy/urls.py	100.00% <0.00%> (ø)
snypy/snippets/urls.py	100.00% <0.00%> (ø)
snypy/snippets/models/managers.py	100.00% <0.00%> (ø)
snypy/snippets/migrations/0004_snippetfavorite.py	100.00% <0.00%> (ø)
snypy/snippets/rest/serializers.py	76.40% <0.00%> (+1.40%)	⬆️
snypy/snippets/models/querysets.py	75.75% <0.00%> (+3.25%)	⬆️
snypy/snippets/rest/viewsets.py	85.36% <0.00%> (+8.77%)	⬆️
snypy/snippets/admin.py	87.50% <0.00%> (+17.04%)	⬆️

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