Update pg-promise to the latest version 🚀 (#6200)

* fix(package): update pg-promise to version 9.3.6

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -44,7 +44,7 @@
     "mongodb": "3.3.2",
     "node-rsa": "1.0.6",
     "parse": "2.9.0",
-    "pg-promise": "9.3.5",
+    "pg-promise": "9.3.6",
     "pluralize": "^8.0.0",
     "redis": "2.8.0",
     "semver": "6.3.0",