Cast registered_paths keys to list, py3 compat.

T4rk1n · T4rk1n · commit 45521bf81295 · 2018-10-03T13:50:56.000-04:00
diff --git a/dash/dash.py b/dash/dash.py
@@ -332,7 +332,7 @@ def serve_reload_hash(self):
         return flask.jsonify({
             'reloadHash': self._reload_hash,
             'hard': hard,
-            'packages': self.registered_paths.keys(),
+            'packages': list(self.registered_paths.keys()),
             'files': list(changed)
         })
 
