Bump nodemon from 1.17.3 to 1.18.9

Bumps [nodemon](https://github.com/remy/nodemon) from 1.17.3 to 1.18.9.
- [Release notes](https://github.com/remy/nodemon/releases)
- [Commits](remy/nodemon@v1.17.3...v1.18.9)

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

Author: dependabot-support

package-lock.json

@@ -46,6 +46,6 @@
     "jshint": "^2.9.6",
     "jslint": "^0.12.0",
     "mocha": "^5.2.0",
-    "nodemon": "^1.17.3"
+    "nodemon": "^1.18.9"
   }
 }