Revert "unpin werkzeug"

This reverts commit a981e24.

setup.py

@@ -58,6 +58,13 @@ def find_version(*file_paths):
         "requests>=2.22.0",
         "tornado",
         "urllib3",
+        # Needed to un-break httpbin 0.7.0. For httpbin >=0.7.1 and after,
+        # this pin and the dependency itself can be removed, provided
+        # that the related bug in httpbin has been fixed:
+        # https://github.com/kevin1024/vcrpy/issues/645#issuecomment-1562489489
+        # https://github.com/postmanlabs/httpbin/issues/673
+        # https://github.com/postmanlabs/httpbin/pull/674
+        "Werkzeug==2.0.3",
     ],
 }