Update version number to version 4.0.0b0

Author: himanshugoel2797

env/python/setup.py

@@ -86,7 +86,7 @@ def build_extension(self, ext):
                     if not line.startswith('#')]
 
 setup(name='srwpy',
-      version='1.0',
+      version='4.0.0b0',
       description='This is SRW for Python',
       author='O. Chubar et al.',
       author_email='[email protected]',