How to deal with the region crate dependency?

This crate hasn't seen any updates in almost 2 years and aside from ring is the only reason we still depend on windows-sys 0.52 from 2 years ago. And for cg_clif it is the only reason any windows-sys version other than the latest is used. windows-sys versions before last minor version ship with import libraries for each target rather than using raw-dylib. There is an open PR for region to use latest windows-sys (https://github.com/darfink/region-rs/pull/38), but I don't have much faith it will be merged any time soon.