Better updating and Apple Music focus

A few tweaks and additions I wanted to make over the past month, but I was suffering in college finals hecc, so this took a bit

Added

• Add miniArtwork setting
  • This adds a tiny artwork display to the mini player
• Add warning when online Apple Music is playing/streaming, as this data isn't exposed to the widget. This avoids the error when this happens
• (Beta) Implement a more robust update mechanism, with the ability to update the widget without download prompts and transferring your settings to the new version

Fixed

• Fix Apple Music artwork on Catalina? (#7)
• Fix artwork display when the image file isn't a square
• Fix positioning with anything other than top and left