Changelog:
============
- Fix signing key selection order when key rotation is enabled via SECRET_KEY_FALLBACKS.
- Fix type hint for cli_runner.invoke.
- flask --help loads the app and plugins first to make sure all commands are shown.
- Mark sans-io base class as being able to handle views that return AsyncIterable.
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
