qmmp: update to 1.5.0

Version 1.5.0
* added media library plugin (experimental)
* added PipeWire plugin (experimental)
* added built-in CUE editor
* added m4b support in the ffmpeg plugin
* added option to enable CRC checking in the mpeg plugin
* added ID3v1/ID3v2 charset detection using librcd library in the mpeg plugin
* added WebP format support for cover image
* added groups rebuilding after playlist updating
* added metadata formatter optimization
* added "%dir()" function in the metadata formatter
* added feature to integrate widgets to the main interface from plugins
* added feature to execute external command in the fileops plugin
* improved visualization synchronization
* improved lyrics plugin:
  - added widget mode
  - show text of the current playing song (in the widget mode only)
  - changed user interface
* improved qsui plugin:
  - added feature to add dock widgets from plugins
  - added feature to change tab bar position
  - added icons to the file system browser menu
  - added feature to place dock widgets in the multiple lines
  - removed "Actions" submenu, using "Tools" menu instead
* improved skinned plugin:
  - added playlist color settings
  - moved "Show playlists" option to "Playlist" submenu
  - moved "group tracks" and "show header" options to "Playlist" submenu
* removed some deprecated API usage
* removed obsolete code
* changed minimal FFmpeg version to 3.4
* updated Portuguese translation (S辿rgio Marques)
* updated Dutch translation (Heimen Stoffels)
* updated Polish translation (mrerexx)
* updated Galician translation (Delio Docampo Cordeiro)
* updated Spanish translation (Joel Barrios)
* updated Russian translation (Ilya Kotov)
* updated Ukrainian translation (Gennady Motsyo)
* updated French translation (Adrien Vigneron)
* updated Indonesian translation (Andika Triwidada)
* updated Greek translation (Dimitrios Glentadakis)
* updated Italian translation (Luigi Toscano)
* updated German translation (Ettore Atalan)
* updated Finnish translation (Jiri Gr旦nroos, Kimmo Kujansuu)

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