v2.1

Content changes

• ✨ Replace approximately 250 of the JPEG maps that came from the original deck with nice, consistent PNG maps sourced from a single Wikimedia project 2be1404
• ❗️ Fix typo in capital of The Gambia: Bajul Banjul a44f0a8
• 🗺 Replace map of the Balkan Peninsula with a less confusing one 6e7fbe7 610c4bb

Other changes

• Increase font size of COUNTRY/CAPITAL cues 003b828
• Tweak top spacing of cards a30dcce
• Convert deck description to simpler HTML to ease sharing on AnkiWeb 257de6d
• ↘️ Convert 20 SVG flags to PNG to reduce deck size 76b9509
• 👮 Add image licences to LICENSE.md and list the remaining images for which the licence isn't known 9f56666