Drops every cached tag AND release list. Exported for tests and for any caller that has just
pushed a tag or published a release and needs the next lookup to reflect it immediately.
Named for tags because that is what it originally cleared; it clears both, because a "clear" that
left stale releases behind would be a trap.
Drops every cached tag AND release list. Exported for tests and for any caller that has just pushed a tag or published a release and needs the next lookup to reflect it immediately.
Named for tags because that is what it originally cleared; it clears both, because a "clear" that left stale releases behind would be a trap.