audio/ncmpc: Update to 0.29

Change log: https://raw.githubusercontent.com/MusicPlayerDaemon/ncmpc/v0.29/NEWS

PR: 225116
Submitted by: Dmitri Goutnik <dg@syrec.org>
Approved by: tcberner (mentor), henrik@affekt.org (maintainer)
Differential Revision: https://reviews.freebsd.org/D14114