kiji-bento: [maven-release-plugin] prepare for next development iteration

commit: https://github.com/kijiproject/kiji-bento/commit/05ed4122be080e74e7720da0b06e26eae75010e9
kiji-bento: [maven-release-plugin] prepare release kiji-bento-root-1.4.0

commit: https://github.com/kijiproject/kiji-bento/commit/50505e331a1cc44d4cd3c16ebab707346cf6e796