fix: make typing_extensions a conditional runtime dep for Py 3.10

`src/workos/_types.py` imports `Self`, which landed in stdlib `typing`
only in Python 3.11. Use a `sys.version_info` conditional so 3.11+ uses
stdlib and 3.10 falls back to `typing_extensions`, matching the SDK's
`requires-python = '>=3.10'`.

Mark `typing_extensions~=4.0` as `python_version < '3.11'` in the
dependency list so pip/uv only install it on 3.10 — 3.11+ users don't
pay the transitive-dep cost. Drop the now-unconditional typing_extensions
check from the smoke test (the conditional import is exercised whenever
workos itself is imported).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: gjtorikian

pyproject.toml

@@ -11,7 +11,7 @@ dependencies = [
   "cryptography~=46.0",
   "httpx~=0.28",
   "pyjwt~=2.12",
-  "typing_extensions~=4.0",
+  "typing_extensions~=4.0; python_version < '3.11'",
 ]
 
 [project.urls]

src/workos/_types.py

@@ -5,8 +5,12 @@
 import sys
 from datetime import datetime
 from enum import Enum
-from typing import Any, Dict, NoReturn, Protocol, TypeVar
-from typing_extensions import Self, TypedDict
+from typing import Any, Dict, NoReturn, Protocol, TypedDict, TypeVar
+
+if sys.version_info >= (3, 11):
+    from typing import Self
+else:
+    from typing_extensions import Self
 
 
 class RequestOptions(TypedDict, total=False):

tests/smoke_test.py

@@ -205,11 +205,8 @@ def test_dependencies_available() -> None:
     import cryptography
     import httpx
     import jwt
-    import typing_extensions
 
-    print(
-        "✓ Core dependencies available (httpx, cryptography, pyjwt, typing_extensions)"
-    )
+    print("✓ Core dependencies available (httpx, cryptography, pyjwt)")
 
 
 def main() -> int: