Release Kibitz version 3.0.0-alpha.16.
Release Kibitz version 3.0.0-alpha.16.

 * Fix for Happenstance upgrade.
 * Upgrade `islander` to `5.0.0-alpha.10`.
 * Upgrade `happenstance` to `^13.0.0-alpha.0`.
 * Upgrade `paxos` to `19.0.0-alpha.16`.

Closes #267.

bigeasy/kibitz,bigeasy/kibitz