fix: Added py.typed to MANIFEST.in (#1526)

* Added py.typed to MANIFEST.in

* Moved from MANIFEST.in to py.typed per PR suggestion

* chore: Refresh system test creds.

* Add py.typed to MANIFEST.in

---------

Co-authored-by: Carl Lundin <[email protected]>

Author: jamesbraza

MANIFEST.in

@@ -1,3 +1,4 @@
 include README.rst LICENSE CHANGELOG.rst
 recursive-include tests *
 global-exclude *.pyc __pycache__
+global-include *.typed

setup.py

@@ -58,6 +58,7 @@
     packages=find_namespace_packages(
         exclude=("tests*", "system_tests*", "docs*", "samples*")
     ),
+    package_data={"google.auth": ["py.typed"], "google.oauth2": ["py.typed"]},
     install_requires=DEPENDENCIES,
     extras_require=extras,
     python_requires=">=3.7",