x11/wl-mirror: update to 0.14.2

Changes: https://github.com/Ferdi265/wl-mirror/releases/tag/v0.14.0
Changes: https://github.com/Ferdi265/wl-mirror/releases/tag/v0.14.1
Changes: https://github.com/Ferdi265/wl-mirror/releases/tag/v0.14.2
Reported by: GitHub (watch releases)