Try including package data

Author: adamtheturtle

setup.py

@@ -31,6 +31,10 @@
     url='http://vws-python.readthedocs.io',
     keywords='vuforia fake client',
     package_dir={'': 'src'},
+    include_package_data=True,
+    package_data = {
+        'vws': ['py.typed'],
+    },
     install_requires=INSTALL_REQUIRES,
     extras_require={
         'dev': DEV_REQUIRES,