Updated to version 2.7.5 (#2395)

Author: zatine

setup.py

@@ -50,7 +50,7 @@ def get_static_files(path):
 
 setup(
     name='luigi',
-    version='2.7.4',
+    version='2.7.5',
     description='Workflow mgmgt + task scheduling + dependency resolution',
     long_description=long_description,
     author='The Luigi Authors',