chore(utxorpc): update spec to v0.14 and update redeemer mapper (#559)

Co-authored-by: ricomiles <ricoquiblat@gmail.com>

pallas-traverse/src/redeemers.rs

@@ -1,5 +1,6 @@
 use std::borrow::Cow;
 
+use pallas_codec::minicbor;
 use pallas_primitives::{alonzo, conway};
 
 use crate::MultiEraRedeemer;
@@ -78,4 +79,11 @@ impl<'b> MultiEraRedeemer<'b> {
             })),
         )
     }
+
+    pub fn encode(&self) -> Vec<u8> {
+        match self {
+            MultiEraRedeemer::AlonzoCompatible(x) => minicbor::to_vec(x).unwrap(),
+            MultiEraRedeemer::Conway(k, v) => minicbor::to_vec((k, v)).unwrap(),
+        }
+    }
 }