v0.13.0

• searching/filtering by title/album/artist/year/folder/path (#662, #367)
  • the query may freely combine details from tracks and their parent entities (album/artist/folder)
  • searching by album name and year works only in the Albums view
  • searching by folder name/path works only in the Folders view
  • quotation may be used to treat multiple words as a single entity instead of as separate substrings
  • searching by title/album/artist works also within the Files app, but this is much more limited than within the Music app
• improved performance/scalability for huge music collections also in the "All tracks" view
• improved quality of cover images in the Albums view and in the Ampache/Subsonic APIs (#734)
  • default size for the images is now 380px, but this can be altered with config.php using the key music.cover_size
• Subsonic: respect the size attribute given to method getCoverArt
• support for PHP 7.4 (#738)
• support for Nextcloud 19
• updated getID3 to version 1.9.19 (minus one commit which caused us problems)
• fixed scan state being shown incorrectly after resetting the music collection
• fixed a background color problem on NC18 with dark theme (#739)
• fixed a null-reference problem on the postWrite file hook occurring on NC16+