material-icons 0.7.0 on Node.js NPM

Remove eot font files as they are only required for IE6-8
Remove ttf and otf font files as woff2 and woff font files should be enough for modern browsers
Rename font files to match their CSS class names (MaterialIconsOutlined-Regular → material-icons-outlined)
Refactor Sass mixins and remove unused Sass variables ($material-icons-font-name, $material-icons-font-family)

Delete unused svg font file
Remove local() font references in css as they may cause issues with locally installed fonts
Add files field to package.json to include only css, scss and font files in package
Switch to dart-sass as node-sass is deprecated
Update fonts and codepoints
Add airline_stops, airlines, apps_outage, browser_updated, connecting_airports, expand_circle_down, flight_class, interests, mode_of_travel, soup_kitchen icons