Update to upstream version 0.31
Details:
- Add commands "queued", "seekthrough", "mount", "unmount"
- Support "search" with filter expression (MPD 0.21)
- Support "load" with range
- Allow only tag names after "list"
- Upstream log see https://raw.githubusercontent.com/MusicPlayerDaemon/mpc/v0.31/NEWS
PR: 232854
Submitted by: uzsolt@uzsolt.hu (maintainer)
MFH: 2018Q4