chore(deps): update dependency yargs to v13 (#122)

Author: renovate[bot]

kms/package.json

@@ -21,6 +21,6 @@
     "execa": "^1.0.0",
     "mocha": "^5.2.0",
     "uuid": "^3.2.1",
-    "yargs": "^12.0.5"
+    "yargs": "^13.0.0"
   }
 }