add mockdoc dep

package.json

@@ -40,7 +40,8 @@
     "atob": "^2.0.3",
     "node-localstorage": "^1.3.0",
     "btoa": "^1.1.2",
-    "stream-buffers": "^3.0.1"
+    "stream-buffers": "^3.0.1",
+    "mockdoc": "^0.0.2"
   },
   "devDependencies": {
     "renderjs": "git+https://lab.nexedi.com/nexedi/renderjs.git",