Bump morgan from 1.6.1 to 1.10.0 in /sample

Bumps [morgan](https://github.com/expressjs/morgan) from 1.6.1 to 1.10.0.
- [Release notes](https://github.com/expressjs/morgan/releases)
- [Changelog](https://github.com/expressjs/morgan/blob/master/HISTORY.md)
- [Commits](expressjs/morgan@1.6.1...1.10.0)

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sample/package.json

@@ -19,7 +19,7 @@
     "express": "~4.13.1",
     "express-pouchdb": "^1.0.2",
     "jquery": "^2.2.1",
-    "morgan": "~1.6.1",
+    "morgan": "~1.10.0",
     "pouchdb": "^5.2.1",
     "serve-favicon": "~2.3.0"
   }