Ensure relative out dirs are correctly ignored when copying

[malept]

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Summarize your changes:

This happens when both the dir and the out dir are relative to the current working directory.

Fixes #918.

[codecov]

Codecov Report

Merging #919 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #919   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          12     12           
  Lines         668    669    +1     
=====================================
+ Hits          668    669    +1

Impacted Files	Coverage Δ
ignore.js	100% <100%> (ø)	⬆️

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