update pg driver to work with newer version of postgres

Author: bjrmatos

package-lock.json

@@ -18,7 +18,7 @@
   "dependencies": {
     "bluebird": "3.5.4",
     "jsreport-sql-store": "1.3.0",
-    "pg-promise": "8.5.6"
+    "pg-promise": "10.8.1"
   },
   "devDependencies": {
     "eslint-config-standard": "11.0.0",