Pin Werkzeug<2.2 as it is causing RuntimeErrors, see pallets/werkzeug#2485

Author: jonbannister

.circleci/config.yml

@@ -230,3 +230,14 @@ workflows:
             branches:
               only:
                 - master
+  nightly:
+    triggers:
+      - schedule:
+          cron: "41 22 * * *"
+          filters:
+            branches:
+              only:
+                - master
+    jobs:
+      - build_3_6
+      - build_3_7

setup.py

@@ -55,7 +55,7 @@ def get_long_description():
         "babel",
         "cachelib",
         "click>7.1.0",
-        "dataclasses",
+        'dataclasses; python_version < "3.8"',
         "flask",
         "gevent",
         "gitpython",
@@ -74,6 +74,7 @@ def get_long_description():
         "requests",
         "retrying",
         "stashy",
+        "Werkzeug<2.2",
     ],
     extras_require={
         "prometheus": ["prometheus_client"],