Release v1.2.3.a1

Features

• Add rule E3019 to validate primaryIdentifiers are unique (pull #3023)
• Add rule E3687 to validate ToPort and FromPort (pull #E3026)
• Add rule W3687 to validate ToPort and FromPort (pull #E3026)
• Add rule E3688 to validate both ToPort,FromPort are -1 (pull #E3026)
• Add rule E3021 for validate tagging values (pull #3031)

CloudFormation Specifications

• Update ResourcePath pattern to check for starting / (pull #3019)

Fixes

• Handle refs in REF type checks (pull #3024)
• Ignore_checks was being ignored when the rule was a parent (pull #3032)
• Additional GetAtt support for non registry resources (pull #3027)