AsyncApi version 3.0.0 is not supported

[i-vasilev]

Hello! In December 2023, the Async Api team released a new version 3.0.0, which saw fundamental changes in the yml structure. Now, when I run code generation, an exception throws, that stop all generation and building. Could you fix it?

Yml example:

asyncapi: 3.0.0
info:
  title: Api 3.0.0 Example
  version: 1.0.0
operations:
  operation1:
    action: receive
    channel:
      $ref: '#/channels/channel1'
channels:
  channel1:
    address: my-channel1
    messages:
      channel1:
        $ref: '#/components/messages/message1'
components:
  messages:
    message1:
      bindings:
        kafka:
          bindingVersion: '0.5.0'
          key:
            type: string
            enum: ['myKey']
          schemaIdLocation: 'payload'
          schemaIdPayloadEncoding: 'apicurio-new'
          schemaLookupStrategy: 'TopicIdStrategy'
      payload:
        $ref: "#/components/schemas/Event1"
  schemas:
    Event1:
      type: object
      properties:
        id:
          type: string
          nullable: false
        source:
          type: string
          nullable: false