Depend on audeer>=2.0.0

[hagenw]

This updates the code to work with the changes to audeer.path() introduced in audeer 2.0.0.

It ensures that cache_root and db_root point always to the real path, by using audeer.path(..., follow_symlink=True) when first assigning them, whereby it assumes that audformat.Database.root returns already a real path.

The tests are cleaned up by using audeer.mkdir("a", "b") instead of audeer.mkdir(audeer.path("a", "b")), and the same for audeer.rmdir() and audeer.touch().

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (16e8e6a) 100.0% compared to head (4cfc774) 100.0%.

Additional details and impacted files

Files	Coverage Δ
audb/core/api.py	100.0% <100.0%> (ø)
audb/core/cache.py	100.0% <100.0%> (ø)
audb/core/load.py	100.0% <100.0%> (ø)
audb/core/load_to.py	100.0% <100.0%> (ø)
audb/core/utils.py	100.0% <100.0%> (ø)