add --version flag

[hipstersmoothie]

What Changed

adds a root level flag to display autos version

Why

closes #106

Todo:

• Add tests
• Add docs
• Add SemVer label

[codecov]

Codecov Report

Merging #113 into master will decrease coverage by 0.39%.
The diff coverage is 45.45%.

@@            Coverage Diff            @@
##           master     #113     +/-   ##
=========================================
- Coverage   75.36%   74.97%   -0.4%     
=========================================
  Files          14       14             
  Lines         954      963      +9     
  Branches      136      142      +6     
=========================================
+ Hits          719      722      +3     
- Misses        207      212      +5     
- Partials       28       29      +1

Impacted Files	Coverage Δ
src/cli/args.ts	85.39% <45.45%> (-5.86%)	⬇️

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