Fix python-dateutil dependency constraint (#61)

Allow python-dateutil>=2.8.1 instead of ~=2.8.1 for broader compatibility

Author: mdz

pyproject.toml

@@ -8,7 +8,7 @@ dependencies = [
     "aiohttp>=3.9.1",
     "inflection~=0.5.1",
     "pyjwt>=2.10.0",
-    "python-dateutil~=2.8.1"
+    "python-dateutil>=2.8.1"
 ]
 
 [project.optional-dependencies]