Can you add documentation and other annotations?

[rattrayalex]

Is it possible to do something like this?

foo: joi.string().meta({title: "Foo", description: "This is a foo", "x-myattribute": true})

// convert into:
foo: 
  type: 'string'
  title: 'Foo' 
  description: 'This is a foo'
  x-myattribute: true

I want to use title, description, and custom annotations for openapi via joi-to-openapi-definition.