Add numpy support

[ahuang11]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 94.44444% with 1 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (fix_max_frames@9f8869a). Click here to learn what that means.

Files	Patch %	Lines
streamjoy/serializers.py	92.30%	1 Missing ⚠️

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Additional details and impacted files

@@                Coverage Diff                @@
##             fix_max_frames      #27   +/-   ##
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  Coverage                  ?   77.20%           
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  Files                     ?       12           
  Lines                     ?     1193           
  Branches                  ?        0           
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  Hits                      ?      921           
  Misses                    ?      272           
  Partials                  ?        0           

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