Update setup.py

Author: benkiel

setup.py

@@ -29,7 +29,7 @@
           "write_to": 'Lib/extractor/_version.py',
           "write_to_template": '__version__ = "{version}"',
      },
-    setup_requires=pytest_runner + wheel, ['setuptools_scm'],
+    setup_requires=pytest_runner + wheel + ['setuptools_scm'],
     tests_require=[
         'pytest>=3.0.3',
     ],
@@ -57,4 +57,4 @@
 )
 
 if __name__ == "__main__":
-    setup(**setup_params)
+    setup(**setup_params)