✨ Add support for option argument in ORJsonResponse

[RCambier]

✨ Add support for the option argument of orjson when building an ORJsonResponse.

The orjson.dumps() function supports an option argument [1] where flags can be specified.
This PR makes it available when creating am ORJSONResponse.

For example, to support serializing numpy arrays

return ORJSONResponse(content, option=orjson.OPT_SERIALIZE_NUMPY)

[1] https://github.com/ijl/orjson#option

[codecov]

Codecov Report

Merging #2584 (3d4ed7a) into master (5614b94) will decrease coverage by 0.01%.
The diff coverage is 97.36%.

@@             Coverage Diff             @@
##            master    #2584      +/-   ##
===========================================
- Coverage   100.00%   99.98%   -0.02%     
===========================================
  Files          243      244       +1     
  Lines         7419     7453      +34     
===========================================
+ Hits          7419     7452      +33     
- Misses           0        1       +1     

Impacted Files	Coverage Δ
tests/test_default_response_class.py	99.31% <87.50%> (-0.69%)	⬇️
fastapi/responses.py	100.00% <100.00%> (ø)
tests/test_orjson_custom_encoder.py	100.00% <100.00%> (ø)

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[github-actions]

📝 Docs preview for commit 3d4ed7a at: https://5fecb78b042c8a00a4f5db18--fastapi.netlify.app

[ycd]

There is a PR (see: #1846) proposing this.

[RCambier]

Oh, that's true. Sorry I missed it.

[tiangolo]

Thanks for the interest @RCambier! 🍰

And thanks for the help @ycd!

I added a section to the docs explaining how to make a custom response: https://fastapi.tiangolo.com/advanced/custom-response/#custom-response-class