Provide an updater feature for MASQNode

[kauri-hero]

Current MASQNode does not have any notification or automatic way to instruct a user to update their Node version when releases are done.

There are Rust crates that offer auto-updater functionality, which may provide a solution for this:

https://github.com/localcc/autoupdater
https://crates.io/crates/autoupdater/0.3.0

[kauri-hero]

Discussion in the Rust team - discuss segmenting audiences in terms of types of releases, or staged.
(alpha, beta, production)

Consider that an "update" event is not the same as a typical shutdown so should be handled in a more graceful sense

[kauri-hero]

now covered in MASQ-Project/MASQ-Node-issues#810