fix file name

Author: huidongchen

setup.py

@@ -3,7 +3,7 @@
 if sys.version_info < (3, 6):
     sys.exit('simba requires Python >= 3.6')
 
-from setuptools import setup,find_packages
+from setuptools import setup, find_packages
 from pathlib import Path
 setup(
     name='simba',