chore(package): update nodemon to version 2.0.4

Closes #15

Author: greenkeeper[bot]

package.json

@@ -39,6 +39,6 @@
     "eslint-plugin-promise": "^3.6.0",
     "eslint-plugin-standard": "^3.0.1",
     "minimist": "^1.2.0",
-    "nodemon": "^1.12.1"
+    "nodemon": "^2.0.4"
   }
 }