Create wrappers for rest of RwLock related structures

[hubcio]

Like @spetz did in #242.

[iamazy]

Hi, What are the benefits of doing this?

[hubcio]

Hi, What are the benefits of doing this?

We can seamlessly switch between other RwLock types:
https://crates.io/crates/keepcalm
vs
tokio RwLock
vs
https://crates.io/crates/peace-lock (for debugging purposes, if possible)
vs
https://crates.io/crates/async-lock
and so on.

Currently, if you'd want to do that, you'd have to change around 60 files.

[iamazy]

@hubcio got it, thanks!!!