prepare 0.11.0

[andrewharvey]

once recent PRs are merged, hopefully we can go ahead with a new release

• [x] rebase against master after other PRs merged
• [x] rebuild docs to ensure they reflect all code changes

post release

• [ ] https://github.com/mapbox/mapbox-gl-geocoder/pull/350 and then https://github.com/mapbox/mapbox-gl-geocoder/pull/353