for tag parsing of bools, can now specify antonyms

[muir]

No description provided.

[codecov-commenter]

Codecov Report

Merging #7 (def8646) into main (576e86b) will increase coverage by 7.05%.
The diff coverage is 90.00%.

@@            Coverage Diff             @@
##             main       #7      +/-   ##
==========================================
+ Coverage   79.37%   86.42%   +7.05%     
==========================================
  Files           3        3              
  Lines         223      280      +57     
==========================================
+ Hits          177      242      +65     
+ Misses         29       27       -2     
+ Partials       17       11       -6     

Impacted Files	Coverage Δ
parsetag.go	85.84% <90.00%> (+0.73%)	⬆️
unpack.go	85.33% <0.00%> (+13.90%)	⬆️

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