update nbclassic

setup.py

@@ -147,7 +147,7 @@ setup_args['install_requires'] = [
     'tornado!=6.0.0, !=6.0.1, !=6.0.2',
     'jupyterlab_server~=2.0.0rc0',
     'jupyter_server~=1.0.1',
-    'nbclassic~=0.2.0rc7',
+    'nbclassic~=0.2.0',
     'jinja2>=2.10'
 ]