ska delete upgrade

[johnlees]

Closes #79

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 92.30769% with 1 line in your changes missing coverage. Please review.

Project coverage is 93.18%. Comparing base (28bca4a) to head (c70338f).
Report is 5 commits behind head on master.

Files	Patch %	Lines
src/cli.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #80      +/-   ##
==========================================
+ Coverage   92.95%   93.18%   +0.22%     
==========================================
  Files          16       16              
  Lines        2258     2260       +2     
==========================================
+ Hits         2099     2106       +7     
+ Misses        159      154       -5     

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