os tvOS 14.0 Beta 1 to Beta 2 API Differences

workgroup_object.h
Removed #def OS_WORKGROUP_ATTR_INITIALIZER
Added #def OS_WORKGROUP_ATTR_INITIALIZER_DEFAULT
Added os_workgroup_join()
Added os_workgroup_leave()
workgroup_parallel.h
Declaration
Fromos_workgroup_parallel_t os_workgroup_parallel_create(const char *name, os_workgroup_attr_t attr)
Toos_workgroup_parallel_t os_workgroup_parallel_create(const char *name, os_workgroup_attr_t attr)