Update dependency mongoose to v5.10.15

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": "5.10.14",
+    "mongoose": "5.10.15",
     "mongoose-unique-validator": "2.0.3",
     "morgan": "1.10.0",
     "passport": "0.4.1",

realworld/backend/package.json

@@ -1443,10 +1443,10 @@ [email protected]:
     lodash.foreach "^4.1.0"
     lodash.get "^4.0.2"
 
-[email protected].14:
-  version "5.10.14"
-  resolved "https://registry.yarnpkg.com/mongoose/-/mongoose-5.10.14.tgz#2f245ea578c008939599356ff6a8ba7e7643f987"
-  integrity sha512-lG7TCyjGjVPM4R1HWCyWZbdK7hC4MdWRG7P95hDENXSvaLkGLiP7WZbGT83KzLY8+400x1p6C53UALD3MqpsCA==
+[email protected].15:
+  version "5.10.15"
+  resolved "https://registry.yarnpkg.com/mongoose/-/mongoose-5.10.15.tgz#5e559467890e0883d2a1ff0470a7467a1b47e52d"
+  integrity sha512-3QUWCpMRdFCPIBZkjG/B2OkfMY2WLkR+hv335o4T2mn3ta9kx8qVvXeUDojp3OHMxBZVUyCA+hDyyP4/aKmHuA==
   dependencies:
     bson "^1.1.4"
     kareem "2.3.1"