Release basic map components
This release adds React wrappers for some of the most common Mapbox GL JS components MAPC Digital Services uses in maps, including:
- Map
- Layer and Source
- Tooltip (Mapbox's "Popup")
- Legends
It also includes the first MAPC-specific layer component, which directly links to a Mapbox vector layer on the 101 municipalities in the Greater Boston region. Add in array data, a color scheme, and a color/value matching function for instant choropleths!