dist: Add py.typed marker file (PEP 561)

Author: dalcinl

setup.cfg

@@ -9,8 +9,12 @@ url = https://github.comm/mpi4py/shmem4py
 author = Lisandro Dalcin
 author_email = [email protected]
 
-setup_requires = cffi>=1.13
-install_requires = cffi>=1.13,numpy>=1.12
+[options]
+setup_requires =
+    cffi>=1.13
+install_requires =
+    cffi>=1.13
+    numpy>=1.12
 python_requires = >=3.7
 
 

setup.py

@@ -34,7 +34,10 @@ def run(self):
         'shmem4py',
     ],
     package_data = {
-        'shmem4py' : ['api.pyi'],
+        'shmem4py' : [
+            'api.pyi',
+            'py.typed',
+        ],
     },
     cffi_modules = [
         'shmem4py/src/api_build.py:ffibuilder',

shmem4py/py.typed

@@ -0,0 +1 @@
+# Marker file for PEP 561.