Regular Expressions based Hears not working

[Purus]

When using Regular Expressions on hears, it does not work as === is used. should this be changed to support regex?

    hears: (patterns, message) => {
      return patterns.some(pattern => {
        if (message.intent.name === pattern) {
          debug('Rasa intent matched hear pattern', message.intent, pattern)
          return true
        }
      })
    }

[Purus]

Created this pull request. Please review and publish.

https://github.com/howdyai/botkit-rasa/pull/7