feat: add --version command line option

[wellwelwel]

Closes #591.

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Note

I don't intend to document this feature, but to include it in the template when opening an issue.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.02%. Comparing base (08d4fbf) to head (3a6db52).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #643      +/-   ##
==========================================
- Coverage   99.18%   99.02%   -0.17%     
==========================================
  Files          34       34              
  Lines        1837     1839       +2     
  Branches        8        6       -2     
==========================================
- Hits         1822     1821       -1     
- Misses         10       12       +2     
- Partials        5        6       +1     

Flag	Coverage Δ
linux	?
osx	99.02% <100.00%> (+<0.01%)	⬆️
windows	?

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