service_provider_dsl.rb in pact-1.64.0

- old
+ new

@@ -19,10 +19,16 @@
 
         CONFIG_RU_APP = lambda {
           unless File.exist? Pact.configuration.config_ru_path
             raise "Could not find config.ru file at #{Pact.configuration.config_ru_path} Please configure the service provider app or create a config.ru file in the root directory of the project. See https://github.com/pact-foundation/pact-ruby/wiki/Verifying-pacts for more information."
           end
-          Rack::Builder.parse_file(Pact.configuration.config_ru_path).first
+          result = Rack::Builder.parse_file(Pact.configuration.config_ru_path)
+
+          if result.respond_to?(:first) # rack 2
+            result.first
+          else # rack 3
+            result
+          end
         }
 
         def initialize name
           @name = name
           @publish_verification_results = false