button elements should have type="button"

[jaydenseric]

button elements created by Mapbox should have type="button", to ensure they never function as submit buttons if the map is within a form element.

mapbox-gl-js version: v2.2.0

browser: N/A

Steps to Trigger Behavior

1. Create a HTML form, and mount a Mapbox map somewhere inside it.

2. Click the toggle attribution button in the bottom right of the map, and notice that it submits the form:

   

Expected Behavior

Buttons created by Mapbox within the map should not submit a surrounding form when clicked. For proper semantics, they should have type="button".

Actual Behavior

The opposite.