Compatible with Cinnamon 4.0

Changelog 1.3.3 (2019.02.19) :

• Added some /* Shamoi */ tags to keep track of what has been modified by me.

Changelog 1.3.2 (2019.02.08) :

• Fxed the crash occuring after selecting any player in the " Launch Player " feature of the applet menu.
• Increased the ICON_SIZE of the players in " Launch Player " from 28 to 30.
• Increased the album art size shown in the media info when playing audio.
• Album art size can now be maxed out to 320 in the applet settings.
• Decreased VOLUME_ADJUSTMENT_STEP to 0.01% instead of 0.05% increments.