Spotify 2.1 Like/Unlike button fix

This update fixes liking/unliking tracks in Spotify. It also adds a new variable spotify.liked which allows you to check whether the current track is liked or not.

How to update:

1. Back up any custom buttons or commands in the premade Spotify deck in SAMMI.
2. Download the updated .sef file.
3. Install the extension. When SAMMI asks you to replace the deck, press yes.
4. You’re back in business!