fix(package): update pg-promise to version 7.3.1 (parse-community#4324)

Closes parse-community#4323

Author: flovilmart

package.json

@@ -34,7 +34,7 @@
  "parse-server-push-adapter": "2.0.2",
  "parse-server-s3-adapter": "1.2.0",
  "parse-server-simple-mailgun-adapter": "1.0.1",
- "pg-promise": "7.2.1",
+ "pg-promise": "7.3.1",
  "redis": "2.8.0",
  "request": "2.83.0",
  "semver": "5.4.1",