[Idea] Command to automatically update "cleosrv version update"

[omarkohl]

flyctl does it, correctly replacing the binary in a fixed location:

$ flyctl version update
Update available 0.0.441 -> v0.1.12.
Run "flyctl version update" to upgrade.
/bin/bash -c
Running automatic update [curl -L "https://fly.io/install.sh" | sh]
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1475    0  1475    0     0   3811      0 --:--:-- --:--:-- --:--:--  3811
######################################################################## 100,0%
set channel to shell
flyctl was installed successfully to /home/tommy/.fly/bin/flyctl
Run 'flyctl --help' to get started

Check how the implement it.