Remove bumpversion and rely on jaraco.develop for finalize operation.

Author: jaraco

.bumpversion.cfg

@@ -63,11 +63,10 @@ description = assemble changelog and tag a release
 skip_install = True
 deps =
 	towncrier
-	bump2version
 	jaraco.develop >= 7.23
 pass_env = *
 commands =
-	python tools/finalize.py
+	python -m jaraco.develop.finalize
 
 [testenv:vendor]
 skip_install = True