v0.30.1

What's Changed

• homebrew: pin the v0.30.0 checksums by @leonkacowicz in #57
• docs: the ritual was the engine's job all along by @leonkacowicz in #58
• diff: name the ref on the right, not a working tree that took no part by @leonkacowicz in #59
• tests: an index built to break the serialiser, instead of the real one by @leonkacowicz in #60
• discovery: stop at the git repository root by @leonkacowicz in #61
• release: v0.30.1 by @leonkacowicz in #62

Full Changelog: v0.30.0...v0.30.1