Add deps.edn installation to README

Author: weavejester

README.md

@@ -9,7 +9,11 @@ and HTTP APIs.
 
 ## Installation
 
-Add the following dependency to your `project.clj`:
+Add the following dependency to your deps.edn file:
+
+    ring/ring-defaults {:mvn/version "0.3.4"}
+
+Or to your Leiningen project file:
 
     [ring/ring-defaults "0.3.4"]