Add a sub-command for computing the next release version number by
applying Semantic Versioning rules to the release notes added to a
project since the last published release.
Add configuration options to control which notes sections trigger
updates to each level of the version number.
Change-Id: I96be0c81a3947aaa0bf9080b500cf1bc77abe655
Signed-off-by: Doug Hellmann <doug@doughellmann.com>
789ecb12d2