`@font-face/src` syntax test

Every syntax that shows a green checkmark next to it is supported by the current browser.

format('woff2'): ✓
format(woff2): ✓
format('woff2-variations'): ✓
format(woff2-variations): ✓
format('woff2 supports variations'): ✓
format('woff2' supports variations): ✓
format(woff2 supports variations): ✓
format('woff2') tech('variations'): ✓
format('woff2') tech(variations): ✓
format(woff2) tech(variations): ✓
format(woff2) tech(variations), format('woff2-variations'): ✓