make typing-extensions dependency mandatory

It's imported unconditionally in:
lib/solaar/ui/about/presenter.py:19
lib/logitech_receiver/hidpp10.py:22
lib/logitech_receiver/hidpp20.py:35

Fixes 469c04f (committed as part of #2428).

setup.py

@@ -76,12 +76,13 @@ setup(
         "psutil (>= 5.4.3)",
         'dbus-python ; platform_system=="Linux"',
         "PyGObject",
+        "typing_extensions",
     ],
     extras_require={
         "report-descriptor": ["hid-parser"],
         "desktop-notifications": ["Notify (>= 0.7)"],
         "git-commit": ["python-git-info"],
-        "test": ["pytest", "pytest-mock", "pytest-cov", "typing_extensions"],
+        "test": ["pytest", "pytest-mock", "pytest-cov"],
         "dev": ["ruff"],
     },
     package_dir={"": "lib"},