message: changelog v2.2.0
diff: @@ -6,6 +6,9 @@ Note that since we don't clearly distinguish between a public and private interf
  ## [Unreleased]
  +
  +## [v2.2.0] - 2021-07-31
  +
  - Add `tubularHelices` parameter to Cartoon representation
  - Add `SdfFormat` and update SDF parser to be able to parse data headers according to spec (hopefully :)) #230
  - Fix mononucleotides detected as polymer components (#229)
  