Expand globs in simple script arguments

[HexDecimal]

Expands globs in simple cases using the following rules:

• If any path is a existing folder or file then it's used as-is, even if it can be used as a glob pattern. This is supposed to ensure that there's no surprises or regressions.
• Otherwise the glob is expanded with Python's glob module. If this results in no files then it raises FileNotFoundError.

Added tests for this.

Some commands are too complex for this workaround. This only applies to commands which takes one list of arguments and not commands with more complex positional parameters such as delocate-fuse and delocate-patch.

I'd rather not merge this PR until it's reviewed.

Fixes #71

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a17dc82) 96.40% compared to head (62f0a50) 96.45%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #197      +/-   ##
==========================================
+ Coverage   96.40%   96.45%   +0.04%     
==========================================
  Files          15       15              
  Lines        1169     1184      +15     
==========================================
+ Hits         1127     1142      +15     
  Misses         42       42              

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[HexDecimal]

After some more thought and better tests I've decided that this shouldn't cause issues when merged. Preferring literal names to glob expansion should avoid theoretical regressions, and this PR is very easy to revert if any unexpected edge cases do appear.