parser fails when using oneOf

[rmelian]

The following example fails:

asyncapi: '2.0.0-rc1'
id: 'urn:hello-world-oneOf'
info:
  title: Hello world oneOf application
  version: '0.1.0'
channels:
  hello:
    publish:
      message:
        oneOf:
          - $ref: '#/components/messages/hello-msg1'
          - $ref: '#/components/messages/hello-msg2'          
        
components:
  messages:
    hello-msg1:
      payload:
        type: string
        pattern: '^hello .+$' 
    hello-msg2:
      payload:
        type: string        

with error

Error: Unexpected token u in JSON at position 0
      at Object.parse (lib/parser.js:72:11)

[fmvilas]

Uhm! Weird. Are you sure it's just when using oneOf? Or is it happening always?

[rmelian]

only oneOf failing, you can see an example here #13

[fmvilas]

Copying here the comment that I left on the PR:

Not sure what the problem is but I just tested it on the #12 branch and it's not failing anymore. Thanks for this PR anyway 👍