fix(package): update pg-promise to version 6.3.1 (#3992)

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
     "parse-server-push-adapter": "2.0.0",
     "parse-server-s3-adapter": "1.1.0",
     "parse-server-simple-mailgun-adapter": "1.0.0",
-    "pg-promise": "6.3.0",
+    "pg-promise": "6.3.1",
     "redis": "2.7.1",
     "request": "2.81.0",
     "semver": "5.3.0",