Build statically linked binaries for linux

[sam701]

It would be nice to have statically linked libraries for linux so that the same binary can be used in ubuntu and alpine, etc.

See

• https://doc.rust-lang.org/edition-guide/rust-2018/platform-and-target-support/musl-support-for-fully-static-binaries.html
• https://github.com/actions-rs/cargo