Fix devcards build locally (#159)

See bhauman/devcards#168

Author: SevereOverfl0w

package.json

@@ -9,6 +9,7 @@
   "author": "",
   "license": "EPL-2.0",
   "dependencies": {
+    "create-react-class": "15.6.3",
     "karma": "^6.4.4",
     "karma-chrome-launcher": "^3.2.0",
     "karma-cljs-test": "^0.1.0",
@@ -17,5 +18,9 @@
     "react-refresh": "^0.17.0",
     "shadow-cljs": "^3.1.7",
     "showdown": "^2.1.0"
+  },
+  "devDependencies": {
+    "highlight.js": "^11.11.1",
+    "marked": "^17.0.1"
   }
 }

shadow-cljs.edn

@@ -19,10 +19,12 @@
                   :refresh {:entries [refresh-example]
                             :depends-on #{:shared}}}
         :compiler-options {:devcards true}
-        :dev {:compiler-options {:output-feature-set :es6}}
+        :dev {:compiler-options {:output-feature-set :es2018}}
         :devtools {:http-root    "public/dev"
                    :http-port    8700
-                   :preloads     [devtools.preload]}}
+                   :preloads     [devtools.preload]}
+        :js-options {:resolve {"devcards-marked" {:target :npm :require "marked"}
+                               "devcards-syntax-highlighter" {:target :npm :require "highlight.js"}}}}
 
   :test     {:target    :browser-test
              :test-dir  "public/test"