v1.1.0

* Replace kingpin CLI parser with kong - no changes in behavior expected
* Add zap logging
* Update release packaging

v1.0.3

* Point release for the proper fix for changed TLS behavior.
* Addss --tls-host and EMAIL_TLSHOST environment variable to allow specifying
  a different TLS servername from the hostname.

v0.0.1

Initial release of the tool for travis to publish.