v0.22.0

Changelog

• 9596ccd release: v0.22.0
• 2f5d50a fix(explorer): honest degradation on pre-iteration-2 relays (order=/signer= feature probe) (#193)
• e9164fb feat(explorer): index v0 iteration 2 wiring — actor ledger, recency browse, honest projections (#192)
• cfc617b feat(relay): implement index v0 iteration 2 — title projection, order=, signer= (TS + Go + conformance) (#191)
• 19ba018 feat(spec): index v0 iteration 2 — actor, clock, name (#190)