If a subcommand does not set a version, use the root command's version

[FollowTheProcess]

Summary

If a Command does not define it's own cli.Version, fallback to using the root command's version which is probably what will happen 99% of the time because who versions subcommands?

[codecov]

Codecov Report

❌ Patch coverage is 69.23077% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.50%. Comparing base (aa45774) to head (cc50294).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
command.go	69.23%	1 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #176      +/-   ##
==========================================
+ Coverage   90.65%   91.50%   +0.85%     
==========================================
  Files           5        5              
  Lines        1627     1260     -367     
==========================================
- Hits         1475     1153     -322     
+ Misses        106       61      -45     
  Partials       46       46              

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