Added py.typed files to package so that mypy can analyze them

Author: Quexington

clvm/py.typed

@@ -17,6 +17,9 @@
 setup(
     name="clvm",
     packages=["clvm",],
+    package_data={
+        "": ["py.typed"],
+    },
     author="Chia Network, Inc.",
     author_email="[email protected]",
     url="https://github.com/Chia-Network/clvm",