Bump dateutil max version (#1716)

Author: colonelpanic8

libs/labelbox/pyproject.toml

@@ -6,7 +6,7 @@ authors = [{ name = "Labelbox", email = "engineering@labelbox.com" }]
 dependencies = [
     "google-api-core>=1.22.1",
     "pydantic>=1.8",
-    "python-dateutil>=2.8.2, <2.9.0",
+    "python-dateutil>=2.8.2, <2.10.0",
     "requests>=2.22.0",
     "strenum>=0.4.15",
     "tqdm>=4.66.2",