chore: add dashphrase as dev dependency for example

Author: AJ ONeal

package-lock.json

@@ -33,6 +33,7 @@
   "files": [],
   "devDependencies": {
     "@dashincubator/secp256k1": "^1.7.1-4",
+    "dashphrase": "^1.3.1-0",
     "mocha": "^10.2.0",
     "mocha-lcov-reporter": "0.0.1"
   },