4.12.2:
- Fix processing of hex numbers #929
- Fixed alternative and union operator issues #930

4.12.1:
 - Merge comment fix #919

4.12.0:
- Can now convert yaml to properties properties format (`-o=props`), See [docs](https://mikefarah.gitbook.io/yq/v/v4.x/usage/properties) for more info.
- Fixed document header/footer comment handling when merging (https://github.com/mikefarah/yq/issues/919)
- pretty print yaml 1.1 compatibility  (https://github.com/mikefarah/yq/issues/914)