Add bumpversion config

.bumpversion.cfg

+[bumpversion]
+current_version = 1.6
+commit = False
+tag = False
+parse = (?P<major>\d+)\.(?P<minor>\d+)
+serialize = {major}.{minor}
+
+[bumpversion:file:setup.py]
+search = version="{current_version}"
+replace = version="{new_version}"