message: Add a `CHANGELOG.md` entry for the client async changes
diff: @@ -22,7 +22,7 @@ All notable changes to this project will be documented in this file. The format
  * Change `make-deploy`, `make-transfer` and `sign-deploy` to not overwrite files unless `--force` is passed.
  * Change `make-deploy`, `make-transfer` and `sign-deploy` to use transactional file writing for enhanced safety and reliability.
  * Update pinned version of Rust to `nightly-2021-06-17`
  -
  +* Change the Rust interface of the client library to expose `async` functions, instead of running an executor internally.
  ## [1.2.0] - 2021-05-27
  