Fix max frames

[ahuang11]

Closes #19

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.00000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 77.20%. Comparing base (8a7c706) to head (a0dd967).
Report is 5 commits behind head on main.

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

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #26      +/-   ##
==========================================
+ Coverage   75.19%   77.20%   +2.00%     
==========================================
  Files          12       12              
  Lines        1177     1193      +16     
==========================================
+ Hits          885      921      +36     
+ Misses        292      272      -20     

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