Merge pull request #859 from tsrivishnu/ruby-2-7-positional-and-keywords-args

Positional and keyword argument handling in Ruby 2.7

Author: dasch

lib/kafka/async_producer.rb

@@ -217,7 +217,7 @@ def run
 
           case operation
           when :produce
-            produce(*payload)
+            produce(payload[0], **payload[1])
             deliver_messages if threshold_reached?
           when :deliver_messages
             deliver_messages