Update dependency mongoose to v5.9.1

Author: renovate-bot

realworld/backend/package-lock.json

@@ -27,7 +27,7 @@
     "jsonwebtoken": "8.5.1",
     "method-override": "3.0.0",
     "methods": "1.1.2",
-    "mongoose": "5.9.0",
+    "mongoose": "5.9.1",
     "mongoose-unique-validator": "2.0.3",
     "morgan": "1.9.1",
     "passport": "0.4.1",

realworld/backend/package.json

@@ -1237,10 +1237,10 @@ [email protected]:
     lodash.foreach "^4.1.0"
     lodash.get "^4.0.2"
 
-[email protected].0:
-  version "5.9.0"
-  resolved "https://registry.yarnpkg.com/mongoose/-/mongoose-5.9.0.tgz#0a707c3716faea01416708e9b7676f92160d5950"
-  integrity sha512-vAoQC6RAX5NqXX+H0WKRsvI0gUj3OhFwsu7JHKwsLQ3cNvE7ZfpeG5aDBvbx9XaW0a+Z2ZqysQpktJhSIzLKtg==
+[email protected].1:
+  version "5.9.1"
+  resolved "https://registry.yarnpkg.com/mongoose/-/mongoose-5.9.1.tgz#48a5fafe6bc7b57d6b41b12ebf55fa5f609518d6"
+  integrity sha512-qgS31/nZ63vpr8yBg6w8vaV8ITxwrF2ioNW5AakXmqvVBaOsI0xpDd5QBowESy2InDTk+iDaN5SNgSxGG6GntQ==
   dependencies:
     bson "~1.1.1"
     kareem "2.3.1"