first draft of the stock exchange

project.clj

@@ -3,7 +3,8 @@
   :url "http://example.com/FIXME"
   :license {:name "Eclipse Public License"
             :url "http://www.eclipse.org/legal/epl-v10.html"}
-  :dependencies [[org.clojure/clojure "1.9.0"]]
+  :dependencies [[org.clojure/clojure "1.9.0"]
+                 [org.clojure/core.async "0.4.474"]]
   :java-source-paths ["src/java"]
   :main ^:skip-aot book.core
   :target-path "target/%s"