Add hoplon and javelin as a plugin (#73)

* Hoplon and Javelin plugins

* Only Hoplon plugin

* Bump promesa

* Update sci context access/update

* Bump sci

plugins/javelin/src/scittle/javelin.cljs

@@ -0,0 +1,9 @@
+(ns scittle.javelin
+  {:no-doc true}
+  (:require [sci.configs.hoplon.javelin :refer [config]]
+            [scittle.core :as scittle]))
+
+(defn init []
+  (scittle/register-plugin!
+   ::javelin
+   config))