Update all npm dependencies (2019-04-13)

Author: depfu[bot]

package-lock.json

@@ -55,7 +55,7 @@
     "eslint-config-prettier": "^4.1.0",
     "eslint-plugin-prettier": "^3.0.1",
     "faker": "^4.1.0",
-    "mocha": "^6.1.2",
+    "mocha": "^6.1.3",
     "mongo-seeding": "^3.1.0",
     "nodemon": "^1.18.11",
     "nyc": "^13.3.0",