The new syntax has been supported since ~2017.
From the docs, in case they change:

! New Style
test.random_hash:
  module.run:
    - test.random_hash:
      - size: 42
      - hash_type: sha256

! Legacy Style
test.random_hash:
  module.run:
    - size: 42
    - hash_type: sha256

* Add ability to disable some swap entities and enable others

Change-Id: Ic2f947f7b9fc6f29411a9171d68eb0836fce29ed
Related-task: #PROD-23150 (PROD:23150)

iteritems() was dropped in recent Python3 releases and items() is compatible
with Python 2.7.