v0.3.1

Caution

This release did not publish. These jobs did not succeed:
verify-npm (failure).

The tag and whatever assets are attached are all that exists of
v0.3.1 — the registries do not serve it. Tags here are
immutable, so the recovery is to fix the failure and let release-plz
cut the next patch version.

Fixed

• make the release trigger cover everything a release publishes (#8)