PYTHON-3215 Add Typing :: Typed trove classifier

Author: ShaneHarvey

setup.py

@@ -346,6 +346,7 @@ def build_extension(self, ext):
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: Database",
+        "Typing :: Typed",
     ],
     cmdclass={"build_ext": custom_build_ext, "doc": doc, "test": test},
     extras_require=extras_require,