Enable mypy to discover type hints as specified in PEP 561 (#275)

Author: leszekhanusz

MANIFEST.in

@@ -13,6 +13,8 @@ include tox.ini
 
 include scripts/gql-cli
 
+include gql/py.typed
+
 recursive-include tests *.py *.graphql *.cnf *.yaml *.pem
 recursive-include docs *.txt *.rst conf.py Makefile make.bat *.jpg *.png *.gif
 recursive-include docs/code_examples *.py

gql/py.typed

@@ -0,0 +1 @@
+# Marker file for PEP 561. The gql package uses inline types.

setup.py

@@ -85,6 +85,8 @@
     ],
     keywords="api graphql protocol rest relay gql client",
     packages=find_packages(include=["gql*"]),
+    # PEP-561: https://www.python.org/dev/peps/pep-0561/
+    package_data={"gql": ["py.typed"]},
     install_requires=install_requires,
     tests_require=install_all_requires + tests_requires,
     extras_require={