follow_symlink=False as default in path()

[hagenw]

Relates to #136

Changes the default of follow_symlink in audeer.path() to False.

Also fixes handing the follow_symlink settings to audeer.path() in audeer.safe_path().

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (dc375de) 100.0% compared to head (eed8db7) 100.0%.

Additional details and impacted files

Files	Coverage Δ
audeer/core/path.py	100.0% <100.0%> (ø)

[hagenw]

All tests are passing as we don't test for symbolic links in most of them.
Looking at #136 the most critical functions seem to be:

• audeer.md5() as this pull request will change the MD5 sum when a symbolic link is given.
• audeer.rmdir() as this will now fail for a symbolic link instead of silentely removing it and the original file

For audeer.md5() the symbolic link will only return a different MD5 sum if the basename (under root) is different from the actual file name. So maybe it is ok to also accept this as a breaking change?

[frankenjoe]

To me it makes sense we call audeer.path() with follow_symlink=True in audeer.md5() and audeer.rmdir() since we are not interested in the MD5 of the symbolic link and we want to remove the directory it links to.

[hagenw]

OK, to better keep track of the changes, I will first merge this one and then take care of audeer.rmdir() and audeer.md5() in seperate pull requests.