Requirement of additional nesting in serverless.yml should cause a major version change

[jaredready]

A breaking change was made which changed the configuration of the plugin to go from:

custom:
  swaggerApi:
    ApiGatewayRestApi:
      Name: foo-api
      Body: ${file(./api/foo-service.yaml)}

To:

custom:
  swaggerApi:
    apis:
      ApiGatewayRestApi:
        Name: foo-api
        Body: ${file(./api/foo-service.yaml)}

This causes builds that were once working to start failing, thus warranting a major version bump.

[MAS150MD200]

This doesn't work.