The `Principals` field in sns-init.yaml is no longer required

Hi everyone. The Principals field is no longer required by the sns CLI tool. Accordingly it has been removed from the example sns_init.yaml in sns-testing.

If you’re using dfx sns, you can install the new version with dfx extension install sns --version 0.4.1. (You may have to remove the old version first with dfx extension uninstall sns.)

If you’re downloading sns directly from, you can use f79476803e097d9fd5f7e67d45f6818348b51ac9 as the commit to get this change.