Use array of operations to support multiple definitions per method

[grimmdude]

Relating to https://github.com/appsumo/originals-connect/issues/187, this change requires operations to be defined as an array under the method. It's a minor change, and allow for multiple trigger/action definitions per method.

Will require code changes in https://github.com/appsumo/originals-connect to support new structure (https://github.com/appsumo/originals-connect/pull/192).

Before

paths:
  /contacts:
    post:
      tags:
        - Contact
      summary: New contact
      description: Triggered when a new contact is created.
      operationId: contacts

After

paths:
  /contacts:
    post:
      -
        tags:
          - Contact
        summary: New contact
        description: Triggered when a new contact is created.
        operationId: contacts