check that windows 3.8 is applying patch in pytest

Author: Zsailer

appveyor.yml

@@ -38,4 +38,4 @@ install:
   - IF %CONDA_PY% == 38 pip install --upgrade git+https://github.com/ipython/ipykernel.git
 
 test_script:
-  - pytest
+  - pytest -s -v

jupyter_server/pytest_plugin.py

@@ -28,6 +28,8 @@
 # the future.
 if sys.platform.startswith("win") and sys.version_info >= (3, 8):
 
+    print("Running temporary patch for Windows 3.8")
+
     @pytest.fixture
     def asyncio_patch():
         ServerApp()._init_asyncio_patch()