Description
All of d3 gets bundled with @hackoregon/ui-maps, in places where only some of d3 is needed. All places where import * as d3 from "d3"; is used should be replaced with imports of the needed functions from the smaller d3 modules such as d3-geo.
Steps to reproduce
Use create-react-app to start a new project, yarn add @hackoregon/ui-maps, and use a component like PolygonPreview. Then build, and inspect your bundle using source-map-explorer to see that all of d3 is there.
Screenshot of source-map-explorer showing d3 bundles

Expected result
Should only import needed functions from d3-geo
Actual result
Imported all of d3