fix: ensure changes to files can optionally be staged

[ga-paul-t]

closes #266

[codecov-commenter]

Codecov Report

Merging #270 (7de8e9e) into main (ac8dcc0) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #270      +/-   ##
==========================================
+ Coverage   84.32%   84.36%   +0.04%     
==========================================
  Files          43       43              
  Lines        2073     2079       +6     
==========================================
+ Hits         1748     1754       +6     
  Misses        257      257              
  Partials       68       68              

Impacted Files	Coverage Δ
internal/context/context.go	100.00% <ø> (ø)
cmd/uplift/bump.go	82.89% <100.00%> (+0.22%)	⬆️
cmd/uplift/changelog.go	86.08% <100.00%> (+0.12%)	⬆️
cmd/uplift/release.go	84.80% <100.00%> (+0.12%)	⬆️
cmd/uplift/root.go	80.48% <100.00%> (+0.48%)	⬆️
internal/task/bump/bump.go	94.73% <100.00%> (-0.27%)	⬇️
internal/task/changelog/changelog.go	70.49% <100.00%> (+0.65%)	⬆️

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