Fix bug in new version of setuptools (#297)

Author: holger-motional

setup/setup.py

@@ -43,7 +43,7 @@ def get_dirlist(_rootdir):
     install_requires=requirements,
     packages=packages,
     package_dir={'': 'python-sdk'},
-    package_data={'': '*.json'},
+    package_data={'': ['*.json']},
     include_package_data=True,
     classifiers=[
         'Programming Language :: Python :: 3.6',