[BUG] cargo_atelier has upstream vulnerability RUSTSEC-2021-0139

[stevelr]

Describe the bug
cargo-audit reports an upstream vulnerability

Crate:     ansi_term
Version:   0.12.1
Warning:   unmaintained
Title:     ansi_term is Unmaintained
Date:      2021-08-18
ID:        RUSTSEC-2021-0139
URL:       https://rustsec.org/advisories/RUSTSEC-2021-0139
Dependency tree:
ansi_term 0.12.1
└── clap 2.34.0
    └── structopt 0.3.26
        └── cargo_atelier 0.2.7

To Reproduce
install cargo-auditable and cargo-audit and run as described here https://github.com/rust-secure-code/cargo-auditable

Expected behavior
no warnings

Screenshots/Logs
see above

Environment (please complete the following information):

• Rust Version: 1.64
• Atelier crates: atelier_test 0.1.3
• Client code: n/a

Additional context

Updating to latest structopt (0.3.26) does not fix this. structopt is in maintenance mode and has been integrated into clap. Fixing this requires replacing the structopt dependency in cargo-atelier/src/command_line.rs to clap v4.