fix(deps): update dependency yargs to v13 (#105)

Author: renovate[bot]

asset/snippets/package.json

@@ -18,7 +18,7 @@
     "@google-cloud/asset": "^0.2.0",
     "@google-cloud/storage": "^2.3.0",
     "uuid": "^3.3.2",
-    "yargs": "^12.0.0"
+    "yargs": "^13.0.0"
   },
   "devDependencies": {
     "chai": "^4.2.0",