chore(package): update nodemon to version 2.0.4

Closes #140

Author: greenkeeper[bot]

package.json

@@ -106,7 +106,7 @@
     "flow-bin": "^0.58.0",
     "flow-remove-types": "^1.2.1",
     "generate-release": "^0.14.0",
-    "nodemon": "^1.12.1",
+    "nodemon": "^2.0.4",
     "nsp": "^3.0.0",
     "nyc": "^11.2.1",
     "uuid": "^3.1.0"