v2.5.0

Replace mask with border-radius across all flags:

<svg ...><mask id="a"><circle cx="256" cy="256" r="256" fill="#fff"/></mask><g mask="url(#a)">...</g></svg>

...becomes:

<svg ... style="border-radius:50%">...</svg>

Full Changelog: v2.4.1...v2.5.0