v1.5.3

Fixed

• The changelog inside the package described five releases as unreleased.
  Every tarball from 1.1.0 to 1.5.2 shipped a ## Unreleased section holding
  everything since 1.0.0, so a reader who opened the copy they installed —
  which the API page points them at — had no way to tell
  which version any of it arrived in. The entries are filed under the versions
  that shipped them now. No code changes; this release exists to put the
  corrected file on the registry.