Bump for lein2 compatibility

closes functional-koans#28

Author: trptcolin

Diff for: project.clj

@@ -2,6 +2,7 @@
   :description "The Clojure koans."
   :dependencies [[org.clojure/clojure "1.3.0"]
                  [koan-engine "0.1.2-SNAPSHOT"]]
-  :dev-dependencies [[swank-clojure "1.3.0" :exclusions [org.clojure/clojure]]
-                     [lein-koan "0.1.0"]]
+  :dev-dependencies [[lein-koan "0.1.2"]]
+  :profiles {:dev {:dependencies [[lein-koan "0.1.2"]]}}
+  :plugins [[lein-koan "0.1.2"]]
   :main koan-engine.runner/exec)