Convert PurePath to Strings

[dickermoshe]

Config setup function are typed to return str and return Path, this commit adds the str() around such instances.
Had error:

'PureWindowsPath' object has no attribute 'replace'

Traceback (most recent call last):
  File "C:\Users\<USERNAME>\Music\z\venv\Lib\site-packages\zotify\track.py", line 163, in download_track
    output_template = output_template.replace("{"+k+"}", fix_filename(extra_keys[k]))
                      ^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'PureWindowsPath' object has no attribute 'replace'

[zotify-dev]

Sounds good on paper but why does the patch just replace the contents of track.py with that of config.py? Could you please try that again.