Add xfce4-power-manager as a dependency

pkg.info

@@ -1,7 +1,8 @@
 name: xfce
 description: The Xfce Desktop Environment
 version: 4.18
+revision: 2
 url: https://www.xfce.org/
 architecture: any
-depends: ["exo","garcon","thunar","thunar-volman","tumbler","xfce4-appfinder","xfce4-panel","xfce4-session","xfce4-settings","xfconf","xfdesktop","xfwm4"]
+depends: ["exo","garcon","thunar","thunar-volman","tumbler","xfce4-appfinder","xfce4-panel","xfce4-power-manager","xfce4-session","xfce4-settings","xfconf","xfdesktop","xfwm4"]
 type: source