Update to use latest upstream release version 1.4.4?

[ryoqun]

Hey, I'd like to say thank for creating this crate in the first place. :)

That said, it seems this crate is getting out of sync from the upstream rpmalloc release a bit?:

https://github.com/mjansson/rpmalloc/releases/tag/1.4.4

I'd take the blame of being that guy to nudge busy you... But is there any possibility for the update of this crate or would such pr be accepted from community timely if i did?

A bit of context is that it seems that rpmalloc is certainly fast as talked elsewhere in the case of our workload as well. So, I'm in the process of evaluating it and just want to use the latest and greatest one.