Adds unmaintained jwt crate

[sanpii]

Affected crate(s)

• jwt

Links to upstream issue(s) or PR(s)

mikkyang/rust-jwt#106

Severity

Low. No security advisory found, only outdated dependencies.

Checklist

• Advisory filename(s) starts with RUSTSEC-0000-0000 as the ID
• date field is set to the public disclosure date
• Contains a concise and descriptive title after advisory metadata
• Asked maintainer(s) if publishing an advisory is appropriate

[djc]

• No response in upstream issue since May.
• No maintainer GitHub activity in the past year.
• Last commit is 5 years old.

I feel safe declaring this one unmaintained.

[djc]

Have reached out to the maintainer via private email just to be sure.

Please ping me in a week if there's been no change.