MDSL Version 4.1: GraphQL and AsyncAPI support

See change log for more information.

Release v4.0.0

Version 4.0 of MDSL grammar and tools:

• Language/protocol binding concepts revised and extended
• Generator now supports OpenAPI, gRPC Protocol Buffers, Jolie (which indirectly includes WSDL/XML Schema generation)
• API Linter enhanced with additional validation rules
• Command Line Interface (CLI) for all tools
• Intermediate generator model to ease Freemarker template writing

Public release of MDSL 3 specification (plus editor and demo tools)

See https://microservice-api-patterns.github.io/MDSL-Specification/index