chore(release): 2.2.0

* Add support for setting check attributes ([e6d53280](https://gitlab.dockstudios.co.uk/pub/jmon/jmon-terraform-provider/commit/e6d532806716e087628d84c264c34bef3d23bb9d)), closes [#6](https://gitlab.dockstudios.co.uk/pub/jmon/jmon-terraform-provider/issues/6)