RUSTSEC-2020-0053: dirs: dirs is unmaintained, use dirs-next instead

[brightly-salty]

https://rustsec.org/advisories/RUSTSEC-2020-0053

Crate:         dirs
Version:       1.0.5
Warning:       unmaintained
Title:         dirs is unmaintained, use dirs-next instead
Date:          2020-10-16
ID:            RUSTSEC-2020-0053
URL:           https://rustsec.org/advisories/RUSTSEC-2020-0053
Dependency tree:
dirs 1.0.5
└── binary-install 0.0.2

dirs is unmaintained, dirs-next should be used instead.

I would be willing to implement this and submit a PR if it would be accepted.