Musify

Fixed
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* Remove '&' character handling in :py:class:`.XMLPlaylistParser`. Was being handled twice as it is already
handled by the ``xmltodict`` package.

Fixed
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* Bug in escaping of '&' characters when export :py:class:`.XAutoPF` playlists with the :py:class:`.XMLPlaylistParser`.
Was previously escaping multiple times when already escaped e.g. '&' > '&'.
Now correctly skips already occurrences of '&'.

Added
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* :py:class:`.LocalPlaylist` now allows setting of the ``path`` property
* :py:class:`.LocalLibrary` now allows setting of the ``name`` property. Added ``name`` as an init parameter too.

Changed
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* :py:meth:`.LocalLibrary.merge_playlists` now updates the path of new playlists added to the library to be relative
to the library's ``playlist_folder``

Fixed
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* When given an empty :py:class:`.M3U` playlist file, produces expected result i.e. an empty playlist.
Previously always added all given tracks to playlist when calling :py:meth:`.M3U.load`

Changed
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* :py:meth:`.File.get_filepaths` now ignores hidden files.
* Replace os.makedirs with Pathlib implementation of ``mkdir``q everywhere.

Changed
-------
* Update aiorequestful version to 1.0