update option go_package to point at local repo

[phbnf]

#88

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 34.90%. Comparing base (46ec9c2) to head (835bf87).
Report is 44 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #123      +/-   ##
==========================================
- Coverage   35.80%   34.90%   -0.90%     
==========================================
  Files          16       33      +17     
  Lines        1363     2713    +1350     
==========================================
+ Hits          488      947     +459     
- Misses        801     1659     +858     
- Partials       74      107      +33     

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