2.0.3

• Loop::set() replaces the current driver with a dummy driver for the time of gc_collect_cycles() now. This allows cyclic references to be cleaned up properly before the new driver is set. Without such a fix, cyclic references might have been cleaned up later, e.g. cancelling their watcher IDs on the new loop, thereby cancelling the wrong watchers.
• Promise combinator functions (all(), any(), first(), some()) now preserve order of the given $promises array argument.