Bump version: 1.56 → 1.57

.bumpversion.cfg

@@ -1,7 +1,7 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 1.56
+current_version = 1.57
 parse = (?P<major>\d+)\.(?P<minor>\d+)(\.(?P<patch>\d+)(\-(?P<release>[a-z]+))?)?
 serialize = 
 	{major}.{minor}