v0.4.0

• PROPERTY_DB now also takes a redis://host[:port][/key-prefix] DSN, which
  builds core 0.3's RedisCorpus. Until now that class existed and no suite
  could reach it: the engine reads no environment by design, and this adapter
  hardcoded the filesystem corpus — so a corpus shared between CI and
  developers was available only to harnesses that construct the runner
  themselves. A directory keeps meaning exactly what it meant. ext-redis is
  preferred when loaded, predis/predis otherwise, and neither installed is an
  error rather than a silent fall back to the filesystem.