audio/ncspot: update to 0.13.4

Major changes in 0.13.4:
    * Add save current command
    * Add add command for adding song to playlist
    * Improve release build options
    * Fix: Forward mouse events inside layout
    * Sort Artists Ignoring "The"
    * Fix: Gracefully handle local files
    * Fix: Speed up context menu by fetching album only once

Major changes in 0.13.3:
    * Fix incorrect notification ID reuse
    * Fix: ListView decrement selected on remove
    * Support multiple IPC sockets
    * Fix: command line multi-byte prefix panic
    * Prevent tab switching from the command line
    * Fix: config option command_key not working

Full log : https://github.com/hrkfdn/ncspot/releases