upgrading pg-promise to 8.4.0 (parse-community#4736)

Author: vitaly-t

package.json

@@ -34,7 +34,7 @@
     "mongodb": "3.0.7",
     "multer": "1.3.0",
     "parse": "1.11.1",
-    "pg-promise": "8.2.1",
+    "pg-promise": "8.4.0",
     "redis": "2.8.0",
     "request": "2.83.0",
     "semver": "5.5.0",

spec/PostgresInitOptions.spec.js

@@ -6,22 +6,14 @@ const express = require('express');
 //public schema
 const databaseOptions1 = {
   initOptions: {
-    connect: function (client, dc, isFresh) {
-      if (isFresh) {
-        client.query('SET search_path = public');
-      }
-    }
+    schema: 'public'
   }
 };
 
 //not exists schema
 const databaseOptions2 = {
   initOptions: {
-    connect: function (client, dc, isFresh) {
-      if (isFresh) {
-        client.query('SET search_path = not_exists_schema');
-      }
-    }
+    schema: 'not_exists_schema'
   }
 };