RUSTSEC-2021-0139: ansi_term is Unmaintained

> ansi_term is Unmaintained

| Details | |
| ------------------- | ---------------------------------------------- |
| Status | unmaintained |
| Package | `ansi_term` |
| Version | `0.12.1` |
| URL | [https://github.com/ogham/rust-ansi-term/issues/72](https://github.com/ogham/rust-ansi-term/issues/72) |
| Date | 2021-08-18 |

The maintainer has adviced that this crate is deprecated and will not receive any maintenance.

The crate does not seem to have much dependencies and may or may not be ok to use as-is.

Last release seems to have been three years ago.

## Possible Alternative(s)

The below list has not been vetted in any way and may or may not contain alternatives;

- [anstyle](https://github.com/epage/anstyle)
- [console](https://crates.io/crates/console)
- [nu-ansi-term](https://crates.io/crates/nu-ansi-term)
- [owo-colors](https://crates.io/crates/owo-colors)
- [stylish](https://crates.io/crates/stylish)
- [yansi](https://crates.io/crates/yansi)

## Dependency Specific Migration(s)

- [structopt, clap2](https://github.com/clap-rs/clap/discussions/4172)

See [advisory page](https://rustsec.org/advisories/RUSTSEC-2021-0139.html) for additional details.

The issue names no repository files, tests, or entry points. Start by locating the ansi_term 0.12.1 dependency and its usages, then read the linked advisory and migration discussion before evaluating the listed alternatives; done means the unmaintained dependency is addressed without breaking its current behavior.

Written by the indexing model from the issue text.