update to take jupyter-server/jupyter_server#180

Author: echarles

jupyterlab_server/app.py

@@ -37,6 +37,12 @@ class LabServerApp(ExtensionAppJinjaMixin, ExtensionApp):
     # Should your extension expose other server extensions when launched directly?
     load_other_extensions = True
 
+    @staticmethod
+    def _jupyter_server_extension_paths():
+        return [{
+            'module': 'jupyterlab_server'
+        }]
+
     def initialize_settings(self):
         settings = self.serverapp.web_app.settings
         # By default, make terminals available.

setup.py

@@ -50,7 +50,7 @@
         'json5',
         'jsonschema>=3.0.1',
         'jinja2>=2.10',
-        'jupyter_server@ git+https://github.com/datalayer-contrib/jupyter-server.git@extension_handlers',
+        'jupyter_server@ git+https://github.com/datalayer-contrib/jupyter-server.git@discover-extensionapp-config',
     ],
     setup_args['entry_points'] = {
         'pytest11': [