add numpydev build

Author: jreback

ci/deps/azure-37-numpydev.yaml

@@ -6,7 +6,7 @@ dependencies:
   - pytz
   - Cython>=0.28.2
   # universal
-  - pytest>=4.0.2
+  - pytest>=4.0.2,<5.0.0
   - pytest-xdist
   - pytest-mock
   - hypothesis>=3.58.0