Incorrect DER Encoding Order of SET OF Type

Rasn DER encodes the SET OF type based on lexicographical order of elements; however, I believe the correct order is lexicographical order of encoded elements. For example, the SET OF containing two UTF8 strings "c" and "ab" should be in the order "c" and then "ab" because the encoding "0x0c0163" comes before "0x0c026162"; however, rasn encodes "ab" then "c" because "ab" comes before "c". Reference: https://luca.ntop.org/Teaching/Appunti/asn1.html (section 5.15)

Code snippet to reproduce:

let mut set_of = rasn::types::SetOf::new();
set_of.insert(String::from("c");
set_of.insert(String::from("ab");
let encoding = rasn::der::encode(&set_of).unwrap();
println!("{:?}", encoding);

librasn / rasn

Incorrect DER Encoding Order of SET OF Type #218