Relax structlog requirement to allow structlog v22

Author: Photonios

setup.py

@@ -63,7 +63,7 @@ def run(self):
         "Django>=2.0",
         "enforce>=0.3.4,<=1.0.0",
         "python-dateutil>=2.8.0,<=3.0.0",
-        "structlog>=19,<=20.1.0",
+        "structlog>=19,<23.0.0",
         "ansimarkup>=1.4.0,<=2.0.0",
     ],
     extras_require={