RUSTSEC-2023-0081: safemem is unmaintained

[github-actions[bot]]

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 The repository has been archived by the author.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.

[stappersg]

stappers@juli:~/src/rgit
$ git pull
Already up to date.
stappers@juli:~/src/rgit
$ git remote -v
origin	https://github.com/w4/rgit.git (fetch)
origin	https://github.com/w4/rgit.git (push)
stappers@juli:~/src/rgit
$ grep -ir yaml
tree-sitter-grammar-repository/build.rs:    "llvm-mir-yaml",
stappers@juli:~/src/rgit
$ grep -ir safemem
stappers@juli:~/src/rgit
$

#63