fix: change package_data config

setup.py

@@ -5,7 +5,8 @@ setup(
    name='backbone-adapter-testsuite',
    packages=find_packages(),
    package_data={
-      'backbone-adapter-testsuite': ['features/*.feature', 'fixtures/*.json'],
+      'features': ['features/*.feature'], 
+      'fixtures': ['*.json'],
    },
    include_package_data=True,
    zip_safe=False