Upgrading pg to 8.3.0

Author: mmac1020

package-lock.json

@@ -21,7 +21,7 @@
     "faker": "^4.1.0",
     "git-url-parse": "^11.1.2",
     "nodemon": "^1.18.9",
-    "pg": "^7.4.3",
+    "pg": "^8.3.0",
     "react": "^16.5.2",
     "react-dom": "^16.5.2",
     "sequelize": "^4.38.1",