message: 2.2.1 changelog
diff: @@ -6,6 +6,9 @@ Note that since we don't clearly distinguish between a public and private interf
  ## [Unreleased]
  +
  +## [v2.2.1] - 2021-08-02
  +
  - Add surrounding atoms (5 Angstrom) structure selection query
  - [Breaking] Add maxDistance prop to ``IndexPairBonds``
  - Fix coordinateSystem not handled in ``Structure.asParent``
  