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