Reason for using apple/swift-cmark versus commonmark/cmark?

[gonzalonunez]

Hi!

I'm looking into some memory leaks coming from cmark and was wondering if there was a simple explanation as to why CommonMark doesn't directly target commonmark/cmark?

I have no reason to believe updating will fix some of these issues (yet?), but given that apple/swift-cmark is 100+ commits behind (and 20 ahead) I figured it was worth asking.

Thanks!
Gonzalo