Get more annotations

Hey guys,

I've been taking a look at the Directions API docs and some annotation params caught my attention, but I'm not able to return some of them using the mapbox-gl-directions plugin in a React application. So I came here and spend some time to study the plugin docs, I use this reference: https://github.com/mapbox/mapbox-gl-directions/blob/master/API.md#mapboxdirections .

From what I understand the only params that can be returned using the mapbox-gl-directions plugin is the congestion, is that right? Do I have any other params that I can get, how do I do that?

The way I'm doing it is this:

` const directions = new MapboxDirections({
accessToken: process.env.REACT_APP_TOKEN_MAP_BOX,
unit: 'metric',
profile: 'mapbox/driving',
geometries: 'linestring',
controls: {
inputs: false,
instructions: false,
profileSwitcher: false
},
congestion: true,
annotations: 'congestion,distance,duration,speed'
})`

If you have any tips for me to get the congestion, distance, duration and speed params from the route please tell me!

Start with the API.md MapboxDirections reference and the configuration shown in the issue, then compare the plugin's annotation options with the Directions API documentation. Determine which requested values are supported and how they are exposed in the returned route; document the result or identify the missing plugin support.

Written by the indexing model from the issue text.