Upgraded ClojureScript

Upgraded by one release, since upgrading to the very latest release,
breaks the build on openjdk7 on TravisCI. So trying to do it release
by release.

Author: dotemacs

project.clj

@@ -24,7 +24,7 @@
                     :src-paths ["test/resources"]}
              :1.8 {:dependencies [[org.clojure/clojure "1.8.0"]]}
              :1.9 {:dependencies [[org.clojure/clojure "1.9.0"]
-                                  [org.clojure/clojurescript "1.9.671"]]}
+                                  [org.clojure/clojurescript "1.9.854"]]}
              :dev {:plugins [[jonase/eastwood "0.2.0"]]
                    :global-vars {*warn-on-reflection* true}
                    :dependencies [[org.clojure/clojurescript "1.9.89"]