Disable Latin subset

I understand that by providing `unicode-range`, it makes sure that the all the characters on a single page are served by the fonts, with smaller subsets just downloading the required chunks.

It's a really nice system, but I was wondering if there was a way of excluding a certain subset? In my use case, I'd like to exclude the Latin subset.

That would let me more elegantly fall back to another typeface without downloading them all, manually subsetting, and hosting them.

I'm imagining something that could be requested with an `exclude-subset` url param.

So you'd use something like: `"https://fonts.googleapis.com/css?family=Noto+Sans+SC:300,400,500&display=swap&subset=chinese-simplified&exclude-subset=latin"`