x11-wm/wayfire: update to 0.6.0

Changes: https://github.com/WayfireWM/wayfire/compare/0.5.0...0.6.0
Changes: https://github.com/WayfireWM/wf-config/compare/0.5.0...0.6.0
Changes: https://github.com/WayfireWM/wf-shell/compare/0.5.0...0.6.0
Reported by: GitHub (watch releases)