Release Addendum version 0.0.4.
Release Addendum version 0.0.4.

 * Upgrade `reactor` to `17.0.0-alpha.9`.
 * Upgrade `compassion` to `2.0.0-alpha.6`.
 * Upgrade `destructible` to `7.0.0-alpha.64`.
 * Upgrade `cubbyhole` to `4.0.4`.

Closes #25.

bigeasy/addendum,bigeasy/addendum