Dash Platform Protocol v0.21.0

Features

• introduce consensus error codes (#341, #342)
• split validation logic into basic, signature, fee and state (#331)
• protocol versioning updates (#325, #326, #329, #330, #336, #337, #344, #346, #349, #351)
• removed verify SML flag triggers (#324)

Bug Fixes

• building indices on arrays using prefixItems (#343)

BREAKING CHANGES

• stateTransition.validateStructure renamed to stateTransition.validateBasic and doesn't perfom signature validation
• stateTransition.validateData renamed to stateTransition.validateState
• validation errors are changed
• removed old data triggers
• old serialized data is not compatible