[joseluisq]

This PR enforces UTF-8 arguments and ASCII with hyphens and digits for flags and commands.

Additionally, it fixes an issue where inconsistent use of aliases for special flags (version and help) was allowed (e.g. --v or --h).

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
handler/handler.go	37% smaller
handler/handler_test.go	10% smaller
helpers/helpers.go	10% smaller
helpers/helpers_test.go	0% smaller

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.41%. Comparing base (8a2491a) to head (15c964e).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #11      +/-   ##
==========================================
+ Coverage   97.52%   98.41%   +0.88%     
==========================================
  Files           8        8              
  Lines         769      819      +50     
==========================================
+ Hits          750      806      +56     
+ Misses         15       11       -4     
+ Partials        4        2       -2     

Flag	Coverage Δ
unittests	98.41% <100.00%> (+0.88%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.