multimedia/qmmp-qt6: update to 2.1.3 release (+)

Introduce PIPEWIRE option. ON by default

Changes since 2.1.2:

• fixed latest cURL API support;
• fixed crash in the ladspa plugin;
• fixed memory leak in the wavpack plugin;
• fixed ADTS header detection in the aac plugin;
• fixed error handling in the ffmpeg plugin;
• fixed text scroller geometry in the skinned plugin;
• hide empty plugin categories;
• added partial Swedish translation.