Remove dependency on serde_jcs crate (unmaintained) (#57)

Cargo.toml

@@ -33,6 +33,5 @@ c2pa = { version = "0.33.0", features = ["file_io", "openssl_sign", "openssl_ffi
 futures = "0.3.30"
 hyper = { version = "0.14.30", features = ["client", "http1", "server", "stream"] }
 serde = { version = "1.0.197", features = ["derive"] }
-serde_jcs = "0.1.0" # unmaintained, try to remove
 tempfile = "3.10.1"
 tokio = { version = "1.40", features = ["macros"] }

src/tests/claim_aggregation/test_issuer.rs

@@ -305,7 +305,7 @@ fn sign_bytes(signer: &Jwk, payload: &[u8]) -> Vec<u8> {
 
 fn generate_did_jwk_url(key: &Jwk) -> DidBuf {
     let key = key.to_public();
-    let normalized = serde_jcs::to_string(&key).unwrap();
+    let normalized = serde_json::to_string(&key).unwrap();
     let method_id = multibase::Base::Base64Url.encode(normalized);
     DidBuf::new(format!("did:jwk:{method_id}#0")).unwrap()
 }