`Promises.any_fulfilled_future` does not accept an Event

[hanazuki]

`Promises.any_fulfilled_future` does not accept an Event

[pitr-ch]

This should fix it

diff --git a/lib/concurrent-ruby/concurrent/promises.rb b/lib/concurrent-ruby/concurrent/promises.rb
index 76af4d59..eb0c5e2e 100644
--- a/lib/concurrent-ruby/concurrent/promises.rb
+++ b/lib/concurrent-ruby/concurrent/promises.rb
@@ -2074,8 +2074,8 @@ module Concurrent

       private

-      def resolvable?(countdown, future, index)
-        future.fulfilled? ||
+      def resolvable?(countdown, event_or_future, index)
+        (event_or_future.is_a?(Event) ? event_or_future.resolved? : event_or_future.fulfilled?) ||
             # inlined super from BlockedPromise
             countdown.zero?
       end

[eregon]

@hanazuki Could you make a PR with @pitr-ch's patch and add a spec?

[hanazuki]

Done @eregon