Updated syntax.

Author: ioquatix

lib/async/container/thread.rb

@@ -72,8 +72,7 @@ def exec(*arguments, ready: true, **options)
 					end
 
 					begin
-						# TODO prefer **options... but it doesn't support redirections on < 2.7
-						pid = ::Process.spawn(*arguments, options)
+						pid = ::Process.spawn(*arguments, **options)
 					ensure
 						_, status = ::Process.wait2(pid)