fix: upgrade mongodb -> 3.0.3 for reconnectTries: 0 blocking process exit fix

Fix #6028
Re: mongodb-js/mongodb-core#275

Author: vkarpov15

package-lock.json

@@ -23,7 +23,7 @@
     "bson": "~1.0.4",
     "kareem": "2.0.5",
     "lodash.get": "4.4.2",
-    "mongodb": "3.0.2",
+    "mongodb": "3.0.3",
     "mongoose-legacy-pluralize": "1.0.2",
     "mpath": "0.3.0",
     "mquery": "3.0.0",