The commit <code>e99b3c7</code> releasing version 0.2.2 explicitly deprecates twoway in favour of <code>memchr</code> crate.
twoway
{ "license": "CC0-1.0" }
{ "affected_functions": null, "affects": { "functions": [], "os": [], "arch": [] } }
[]
null
"unmaintained"
"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2021-0146.json"