Bump plexapi from 4.8.0 to 4.9.1 (#1627)

* Bump plexapi from 4.8.0 to 4.9.1

Bumps [plexapi](https://github.com/pkkid/python-plexapi) from 4.8.0 to 4.9.1.
- [Release notes](https://github.com/pkkid/python-plexapi/releases)
- [Commits](https://github.com/pkkid/python-plexapi/compare/4.8.0...4.9.1)

---
updated-dependencies:
- dependency-name: plexapi
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update plexapi==4.9.1

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: JonnyWong16 <9099342+JonnyWong16@users.noreply.github.com>

lib/plexapi/audio.py

@@ -8,6 +8,7 @@ from plexapi.exceptions import BadRequest
 from plexapi.mixins import AdvancedSettingsMixin, ArtUrlMixin, ArtMixin, PosterUrlMixin, PosterMixin
 from plexapi.mixins import RatingMixin, SplitMergeMixin, UnmatchMatchMixin
 from plexapi.mixins import CollectionMixin, CountryMixin, GenreMixin, LabelMixin, MoodMixin, SimilarArtistMixin, StyleMixin
+from plexapi.playlist import Playlist
 
 
 class Audio(PlexPartialObject):
@@ -222,6 +223,11 @@ class Artist(Audio, AdvancedSettingsMixin, ArtMixin, PosterMixin, RatingMixin, S
             filepaths += track.download(_savepath, keep_original_name, **kwargs)
         return filepaths
 
+    def station(self):
+        """ Returns a :class:`~plexapi.playlist.Playlist` artist radio station or `None`. """
+        key = '%s?includeStations=1' % self.key
+        return next(iter(self.fetchItems(key, cls=Playlist, rtag="Stations")), None)
+
 
 @utils.registerPlexObject
 class Album(Audio, ArtMixin, PosterMixin, RatingMixin, UnmatchMatchMixin,