RUSTSEC-2023-0081: safemem is unmaintained

[github-actions]

safemem is unmaintained

Details
Status	unmaintained
Package	safemem
Version	0.3.3
URL	https://github.com/abonander/safemem
Date	2023-02-14

The latest crates.io release was in 2019. The repository has been archived by the author.

See advisory page for additional details.

[syphar]

the dependency is only used in lol_html:

safemem v0.3.3
└── lol_html v1.2.0
    └── docs-rs v0.6.0 (/Users/syphar/src/rust-lang/docs.rs)

But since

• it's unmaintained
• is wrapping unsafe code
• is used in lol_html

I see a theoretical risk that it might be a problem, so I'll keep this issue open.

[syphar]

I created a pull request to lol_html to remove the dependency: cloudflare/lol-html#208

[syphar]

My change to lol_html was merged and then released in 1.2.1, which we updated to in #2458