fix: do not send proprietiesChanged signal for position

The org.freedesktop.DBus.Properties.PropertiesChanged signal is not emitted when this property changes.

https://specifications.freedesktop.org/mpris-spec/2.2/Player_Interface.html#Property:Position

aionowplaying/interface/mpris2.py

@@ -37,6 +37,8 @@ def __init__(self, bus_name: str, it: 'Mpris2Interface' = None):
 
     def set_property(self, name: str, value: Any):
         setattr(self._properties, name, value)
+        if name == PlaybackPropertyName.Position:
+            return
         if isinstance(value, PlaybackProperties.MetadataBean):
             value = DBusBeanMapper.metadata(value)
         self.emit_properties_changed({name: value})