message: changelog notes
diff: UNRELEASED
  ===================
  * see https://github.com/clux/kube-rs/compare/0.50.1...master
  + * `kube` `Config` now allows arbirary extension objects - #425
  + * `kube-derive` now more robust and is using `darling` - #435
  0.50.1 / 2021-02-17
  ===================
  