v0.13.0

• Add a Github Action for pushing to gh-pages on pushes to main
• Add support for Mapbox Atlas.
• Update app UI on browser history changes
• Validate location input on submit
• Add support for Tangram styles
• Switch out BASE_PATH for window.location.pathname in url updates
• Remove border on screenshots
• Add renderer dropdown for styles that support mulitple renderers
• Don't load geocoder without Mapbox token
• Add hotkeys for map controls