v0.3.0

Minor release.
Class B slow-command warnings can now escalate to hard denies via slow.action, and releases are cut with one command via scripts/cut-release.sh.

• feat(config): add slow.action knob to escalate Class B to deny by @karlkfi in #12
• feat(release): add cut-release.sh to automate the release process by @karlkfi in #11

Full Changelog: v0.2.0...v0.3.0