chore(package): update nodemon to version 2.0.4

Closes #14

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
     "babel-register": "^6.26.0",
     "chai": "^4.2.0",
     "mocha": "^6.1.4",
-    "nodemon": "^1.19.1",
+    "nodemon": "^2.0.4",
     "pre-commit": "^1.2.2",
     "standard": "^12.0.1"
   },