Ignore sequoia-openpgp deprecations.

sequoia-openpgp's deprecations in 1.17 effectively force users that enable "-D warnings" to either upgrade to 1.17 (which would force our downstreams to also use that version).

Alternatives are:
- upgrade sequoia-openpgp
- disable "-D warnings"
- ignore the deprecations with #allow.

card-functionality/src/util.rs

@@ -14,6 +14,7 @@ use sequoia_openpgp::parse::stream::{
 };
 use sequoia_openpgp::parse::Parse;
 use sequoia_openpgp::policy::{Policy, StandardPolicy};
+#[allow(deprecated)]
 use sequoia_openpgp::serialize::stream::{Armorer, Encryptor, LiteralWriter, Message};
 use sequoia_openpgp::Cert;
 
@@ -124,6 +125,7 @@ pub fn encrypt_to(cleartext: &str, cert: &Cert) -> Result<String> {
 
     let message = Message::new(&mut sink);
     let message = Armorer::new(message).build()?;
+    #[allow(deprecated)]
     let message = Encryptor::for_recipients(message, recipients).build()?;
     let mut w = LiteralWriter::new(message).build()?;
     w.write_all(cleartext.as_bytes())?;

openpgp-card-sequoia/src/decryptor.rs

@@ -114,6 +114,7 @@ impl<'a, 'app> crypto::Decryptor for CardDecryptor<'a, 'app> {
                 #[allow(non_snake_case)]
                 let S: crypto::mem::Protected = dec.into();
 
+                #[allow(deprecated)]
                 Ok(crypto::ecdh::decrypt_unwrap(&self.public, &S, ciphertext)?)
             }