Fix bug on deserializing payload for local paseto.

[dajiaji]

Close #113.

[codecov]

Codecov Report

Merging #114 (99e0472) into main (a054934) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #114      +/-   ##
==========================================
- Coverage   98.72%   98.71%   -0.01%     
==========================================
  Files          14       14              
  Lines        1329     1328       -1     
==========================================
- Hits         1312     1311       -1     
  Misses         17       17              

Impacted Files	Coverage Δ
pyseto/paseto.py	100.00% <100.00%> (ø)

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