v2.2.0
- Support pluck method [#164](https://github.com/zilkey/active_hash/pull/164) - Support where.not method [#167](https://github.com/zilkey/active_hash/pull/167)
- Support pluck method [#164](https://github.com/zilkey/active_hash/pull/164) - Support where.not method [#167](https://github.com/zilkey/active_hash/pull/167)