Add Musig2 example file

Author: jlest01

examples/musig.rs

@@ -13,7 +13,7 @@ fn main() {
     let seckey2 = SecretKey::new(&mut rng);
     let pubkey2 = PublicKey::from_secret_key(&secp, &seckey2);
 
-    let pubkeys = vec![pubkey1, pubkey2];
+    let pubkeys = [pubkey1, pubkey2];
     let pubkeys_ref: Vec<&PublicKey> = pubkeys.iter().collect();
     let pubkeys_ref = pubkeys_ref.as_slice();
 
@@ -51,7 +51,7 @@ fn main() {
     let sec_nonce2 = nonce_pair2.0;
     let pub_nonce2 = nonce_pair2.1;
 
-    let nonces = vec![pub_nonce1, pub_nonce2];
+    let nonces = [pub_nonce1, pub_nonce2];
     let nonces_ref: Vec<&MusigPubNonce> = nonces.iter().collect();
     let nonces_ref = nonces_ref.as_slice();
 
@@ -71,7 +71,7 @@ fn main() {
     let is_partial_signature_valid = session.partial_verify(&secp, &musig_key_agg_cache, partial_sign2, pub_nonce2, pubkey2);
     assert!(is_partial_signature_valid);
 
-    let partial_sigs = vec![partial_sign1, partial_sign2];
+    let partial_sigs = [partial_sign1, partial_sign2];
     let partial_sigs_ref: Vec<&MusigPartialSignature> = partial_sigs.iter().collect();
     let partial_sigs_ref = partial_sigs_ref.as_slice();