Bump plexapi from 4.15.15 to 4.15.16 (#2383)

* Bump plexapi from 4.15.15 to 4.15.16

Bumps [plexapi](https://github.com/pkkid/python-plexapi) from 4.15.15 to 4.15.16.
- [Release notes](https://github.com/pkkid/python-plexapi/releases)
- [Commits](https://github.com/pkkid/python-plexapi/compare/4.15.15...4.15.16)

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

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

* Update plexapi==4.15.16

---------

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

[skip ci]

lib/plexapi/audio.py

@@ -193,6 +193,7 @@ class Artist(
             similar (List<:class:`~plexapi.media.Similar`>): List of similar objects.
             styles (List<:class:`~plexapi.media.Style`>): List of style objects.
             theme (str): URL to theme resource (/library/metadata/<ratingkey>/theme/<themeid>).
+            ultraBlurColors (:class:`~plexapi.media.UltraBlurColors`): Ultra blur color object.
     """
     TAG = 'Directory'
     TYPE = 'artist'
@@ -213,6 +214,7 @@ class Artist(
         self.similar = self.findItems(data, media.Similar)
         self.styles = self.findItems(data, media.Style)
         self.theme = data.attrib.get('theme')
+        self.ultraBlurColors = self.findItem(data, media.UltraBlurColors)
 
     def __iter__(self):
         for album in self.albums():
@@ -281,6 +283,21 @@ class Artist(
             filepaths += track.download(_savepath, keep_original_name, **kwargs)
         return filepaths
 
+    def popularTracks(self):
+        """ Returns a list of :class:`~plexapi.audio.Track` popular tracks by the artist. """
+        filters = {
+            'album.subformat!': 'Compilation,Live',
+            'artist.id': self.ratingKey,
+            'group': 'title',
+            'ratingCount>>': 0,
+        }
+        return self.section().search(
+            libtype='track',
+            filters=filters,
+            sort='ratingCount:desc',
+            limit=100
+        )
+
     def station(self):
         """ Returns a :class:`~plexapi.playlist.Playlist` artist radio station or `None`. """
         key = f'{self.key}?includeStations=1'
@@ -325,6 +342,7 @@ class Album(
             studio (str): Studio that released the album.
             styles (List<:class:`~plexapi.media.Style`>): List of style objects.
             subformats (List<:class:`~plexapi.media.Subformat`>): List of subformat objects.
+            ultraBlurColors (:class:`~plexapi.media.UltraBlurColors`): Ultra blur color object.
             viewedLeafCount (int): Number of items marked as played in the album view.
             year (int): Year the album was released.
     """
@@ -354,6 +372,7 @@ class Album(
         self.studio = data.attrib.get('studio')
         self.styles = self.findItems(data, media.Style)
         self.subformats = self.findItems(data, media.Subformat)
+        self.ultraBlurColors = self.findItem(data, media.UltraBlurColors)
         self.viewedLeafCount = utils.cast(int, data.attrib.get('viewedLeafCount'))
         self.year = utils.cast(int, data.attrib.get('year'))