update noble secp256k1 and ensure we always return hex.

event.js

@@ -52,5 +52,7 @@ export function verifySignature(event) {
 }
 
 export async function signEvent(event, key) {
-  return secp256k1.schnorr.sign(getEventHash(event), key)
+  return Buffer.from(
+    await secp256k1.schnorr.sign(getEventHash(event), key)
+  ).toString('hex')
 }

keys.js

@@ -5,5 +5,5 @@ export function generatePrivateKey() {
 }
 
 export function getPublicKey(privateKey) {
-  return secp256k1.schnorr.getPublicKey(privateKey)
+  return Buffer.from(secp256k1.schnorr.getPublicKey(privateKey)).toString('hex')
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "nostr-tools",
-  "version": "0.21.4",
+  "version": "0.22.1",
   "description": "Tools for making a Nostr client.",
   "repository": {
     "type": "git",
@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "@noble/hashes": "^0.5.7",
-    "@noble/secp256k1": "^1.3.0",
+    "@noble/secp256k1": "^1.5.2",
     "browserify-cipher": ">=1",
     "buffer": ">=5",
     "create-hash": "^1.2.0",