Bump Langohr to 3.0.0-rc1

Author: michaelklishin

clojure/project.clj

@@ -1,7 +1,7 @@
 (defproject com.rabbitmq/tutorials "1.0.0-SNAPSHOT"
  :description "RabbitMQ tutorials using Langohr"
- :url "http://github.com/rabbitmq/rabbitmq-tutorial"
+ :url "http://github.com/rabbitmq/rabbitmq-tutorials"
  :license {:name "Eclipse Public License"
  :url "http://www.eclipse.org/legal/epl-v10.html"}
  :dependencies [[org.clojure/clojure "1.6.0"]
- [com.novemberain/langohr "2.11.0"]])
+ [com.novemberain/langohr "3.0.0-rc1"]])