Remove dependency on atty

[jonhoo]

Fixes #278.

[codecov]

Codecov Report

Base: 91.14% // Head: 91.17% // Increases project coverage by +0.02% 🎉

Coverage data is based on head (ef67d34) compared to base (d7034f0).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #280      +/-   ##
==========================================
+ Coverage   91.14%   91.17%   +0.02%     
==========================================
  Files          19       19              
  Lines        4237     4237              
==========================================
+ Hits         3862     3863       +1     
+ Misses        375      374       -1     

Impacted Files	Coverage Δ
src/collapse/mod.rs	96.96% <100.00%> (ø)
src/collapse/common.rs	66.95% <0.00%> (+0.21%)	⬆️

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