v0.1.22

Added

• A delivered push reports its diff footprint: git diff --numstat totals, the changed top-level
  scope, and a capped list of changed paths. (#105)
• The reap pass reports how many salvaged tips are parked (salvagedRefs), and parked tips are
  collected 14 days after parking. (#104)
• dahrk repo add warns when the hub's stored git URL differs from what this checkout would
  register. (#103)