Accessible country selector map widget

The SVG map is adapted from Marked-Up SVG World Map by Ben Hodgson, based on Low Resolution World Map by Al MacDonald. The SVG markup is adjusted to include country codes and aria-label attributes with country names.

Accessibility features

• Uses role="listbox" on the world map and role="option" on the countries to enable assistive technologies to parse the map as a list
• Has an aria-label for each country name
• Has an aria-selected attribute on each country that gets toggled on selection (click or enter key)