message: hotfix for hub test
diff: @@ -56,7 +56,7 @@ class TestModelHub(unittest.TestCase):
  hub.set_dir(old_cache)
  def test_download_with_opset(self): # type: () -> None
  - model = hub.load(self.name, self.repo, opset=12)
  + model = hub.load(self.name, self.repo, opset=8)
  self.assertIsInstance(model, ModelProto)
  def test_opset_error(self): # type: () -> None
  