Merge pull request #312 from richardwillars/updateAll

updateAll method uses iteratePlugins method

src/core/Core.js

@@ -116,10 +116,8 @@ class Uppy {
    *
    */
   updateAll (state) {
-    Object.keys(this.plugins).forEach((pluginType) => {
-      this.plugins[pluginType].forEach((plugin) => {
-        plugin.update(state)
-      })
+    this.iteratePlugins(plugin => {
+      plugin.update(state)
     })
   }