fix: update PaperListParams to match Python

[kkweon]

See
https://github.com/paperswithcode/paperswithcode-client/blob/develop/paperswithcode/client.py#L91-L129 for Python counterpart.

[codecov]

Codecov Report

Merging #12 (2b45ea8) into main (70ac12b) will increase coverage by 3.43%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #12      +/-   ##
==========================================
+ Coverage   67.50%   70.93%   +3.43%     
==========================================
  Files           8        8              
  Lines          80       86       +6     
==========================================
+ Hits           54       61       +7     
+ Misses         14       13       -1     
  Partials       12       12              

Impacted Files	Coverage Δ
paper_list.go	81.81% <100.00%> (+13.06%)	⬆️

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