Merge branch 'mpris-fix-artist' into 'master'

Mpris fix artist

See merge request sublime-music/sublime-music!54

sublime_music/dbus/manager.py

@@ -328,6 +328,7 @@ class DBusManager:
             cover_art = AdapterManager.get_cover_art_uri(
                 song.cover_art, "file", allow_download=False
             ).result()
+            cover_art = "file://" + cover_art
         except CacheMissError:
             cover_art = ""
 
@@ -335,11 +336,13 @@ class DBusManager:
         return {
             "mpris:trackid": trackid,
             "mpris:length": duration,
+            # Art URIs should be sent as (UTF-8) strings.
+            # Local files should use the "file://" schema.
             "mpris:artUrl": cover_art,
             # TODO (#71) use walrus once MYPY isn't retarded
             "xesam:album": (song.album.name if song.album else ""),
             "xesam:albumArtist": [artist_name],
-            "xesam:artist": artist_name,
+            "xesam:artist": [artist_name],
             "xesam:title": song.title,
         }