Disable tests on Windows that use ed

[cakebaker]

This PR disables three tests on Windows which currently fail because there is no ed program. It's related to #39, though doesn't fix it.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.82%. Comparing base (d863fe4) to head (2d9e625).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #50      +/-   ##
==========================================
+ Coverage   76.79%   76.82%   +0.02%     
==========================================
  Files           9        9              
  Lines        2564     2567       +3     
  Branches      657      657              
==========================================
+ Hits         1969     1972       +3     
  Misses        466      466              
  Partials      129      129              

Flag	Coverage Δ
macos_latest	77.00% <100.00%> (+0.02%)	⬆️
ubuntu_latest	76.86% <100.00%> (+0.02%)	⬆️

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