add bumpversion config
add bumpversion config

original-commit-id: 62f75e9413cf95e4dea33bf9840c7421c5d95d17
original-commit-url: https://github.com/ipython-contrib/IPython-notebook-extensions/commit/62f75e9413cf95e4dea33bf9840c7421c5d95d17

jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator