Fix a bug in salmon.signal/early-validate-conf that caused it to fail
early-schema validation with newer versions of donut.system.
Update donut.system dependency from club.donutpower/system 0.0.165
to party.donut/system 0.0.203.
Handle non-string error and validation messages in salmon.signal/signal!
Show a humanized error message for early-schema validation errors
Allow donut.system local-refs in component configs
(breaking) salmon.validation/refs-resolveable? now takes a component-id argument so that it can handle local-refs.
Add :name to stack instance.
Add salmon.cloudformation/stack-properties to create a component that
retrieves the properties of an existing CloudFormation stack. Properties
include resources and outputs.