Replace atty dependency in prettytable-rs due to RUSTSEC-2021-0145

[willbuckner]

The title says it all, but there is an advisory for atty which is unmaintained, and this dependency likely needs to be replaced with something else. Advisory is here: https://rustsec.org/advisories/RUSTSEC-2021-0145.html

Thanks!

[pinkforest]

Yeah will get a PR for this one. There is also a panic #140 that needs to be checked.

[pinkforest]

Fixed via 0.10.0 Release