fix: npm audit vulnerabilities (#120)

Author: thinkingserious

package.json

@@ -48,14 +48,14 @@
     "eslint": "^7.5.0",
     "eslint-config-twilio": "~1.31.0",
     "eslint-config-twilio-mocha": "~1.31.0",
-    "mocha": "^8.1.1",
+    "mocha": "^8.3.2",
     "nock": "^13.0.2",
     "nyc": "^15.1.0",
     "sinon": "^9.0.2",
     "tmp": "^0.2.1"
   },
   "optionalDependencies": {
-    "keytar": "^6.0.1"
+    "keytar": "^7.6.0"
   },
   "engines": {
     "node": ">=10.12.0"