bump version

ypankovych · ypankovych · commit 9cfbc590734d · 2021-05-26T16:33:18.000+03:00
diff --git a/setup.py b/setup.py
@@ -3,7 +3,7 @@
 """
 from distutils.core import setup
 
-version = "15.6"
+version = "15.7"
 setup(
     name='pankoff',
     packages=['pankoff'],
