Bump morgan from 1.9.0 to 1.9.1

Bumps [morgan](https://github.com/expressjs/morgan) from 1.9.0 to 1.9.1.
- [Release notes](https://github.com/expressjs/morgan/releases)
- [Changelog](https://github.com/expressjs/morgan/blob/master/HISTORY.md)
- [Commits](expressjs/morgan@1.9.0...1.9.1)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -69,7 +69,7 @@
         "mongoosastic": "4.4.1",
         "mongoose": "5.2.12",
         "mongoose-version": "1.1.0",
-        "morgan": "1.9.0",
+        "morgan": "1.9.1",
         "naught": "1.6.0",
         "parse-dimensions": "0.0.8",
         "passport": "0.4.0",