fix(toml): parsing positive time zone offset

[IgorM867]

Currently, this code throws an error:

toml.parse("time = 1979-05-27T00:32:00+07:00")

According to the TOML specification, this should parse successfully.

Fixes #6187

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.87%. Comparing base (7490085) to head (f767e9c).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6188      +/-   ##
==========================================
- Coverage   96.48%   95.87%   -0.61%     
==========================================
  Files         536      517      -19     
  Lines       41314    41156     -158     
  Branches     6169     6078      -91     
==========================================
- Hits        39860    39460     -400     
- Misses       1409     1651     +242     
  Partials       45       45              

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[kt3k]

LGTM. Thanks for the fix!