更新XXpermission版本，解决android7上调试的BUG

show-client/config.gradle

@@ -101,7 +101,7 @@ ext{
            //replugin
            replugin : 'com.qihoo360.replugin:replugin-plugin-lib:' + "$replugin",
            //xxpermission
            xxpermission : 'com.github.getActivity:XXPermissions:12.6',
            xxpermission : 'com.github.getActivity:XXPermissions:12.8',
            //room
            room_runtime : "androidx.room:room-runtime:2.3.0",
            room_compiler: "androidx.room:room-compiler:2.3.0",