mapbox-gl-js recently changed the function signature for fire, so our most recent beta release (mapbox/mapbox-gl-js#6549) breaks compatibility with this library. see change log here https://github.com/mapbox/mapbox-gl-js/releases/tag/v0.45.0-beta.1

mapbox-gl-draw shouldn't be relying on Map#fire because it is not a public method, but if that is impossible, another option would be to call fire with an object that has a type attribute {type: 'error', message: 'somethingbad', //... rest of the payload properties }. We may also consider making the Event class public so third party libraries like this can use that constructor.