Fixed security alert showing on package diff

Author: rg911

package-lock.json

@@ -60,19 +60,20 @@
     "bluebird": "^3.5.5",
     "catbuffer-typescript": "0.0.11",
     "crypto-js": "^3.1.9-1",
+    "diff": "^4.0.2",
     "futoin-hkdf": "^1.3.1",
     "js-joda": "^1.6.2",
     "js-sha256": "^0.9.0",
     "js-sha3": "^0.8.0",
     "js-sha512": "^0.8.0",
     "long": "^4.0.0",
     "merkletreejs": "^0.1.7",
-    "symbol-openapi-typescript-node-client": "0.8.5",
     "request": "^2.88.0",
     "request-promise-native": "^1.0.5",
     "ripemd160": "^2.0.2",
     "rxjs": "^6.5.3",
     "rxjs-compat": "^6.5.3",
+    "symbol-openapi-typescript-node-client": "0.8.5",
     "tweetnacl": "^1.0.3",
     "utf8": "^2.1.2",
     "ws": "^5.2.0"