The serial crate is no longer maintained.
serial
Last release was on 2017-07-02.
Consider using an alternative, for instance the blocking librarys:
or async alternatives:
{ "license": "CC0-1.0" }
{ "affected_functions": null, "affects": { "arch": [], "functions": [], "os": [] } }
[]
"unmaintained"
null
"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2017-0008.json"