Detect prefixed CSS properties

[gsnedders]

We explicitly exclude Compat:

mdn-bcd-collector/test-builder/css.ts

Line 12 in 3509a91

"https://compat.spec.whatwg.org/", // The Compatibility Standard contains legacy prefixed aliases for properties, ignore

For example, we're missing coverage of -webkit-text-size-adjust.

This would allow us to better update https://developer.mozilla.org/en-US/docs/Web/CSS/text-size-adjust#browser_compatibility with when prefixed versions were first supported (at least for Safari on iOS, I believe this goes back to when it originally shipped, but I haven't investigated that).