Update pg requirement from ^8.11.3 to ^8.13.0

Updates the requirements on [pg](https://github.com/brianc/node-postgres/tree/HEAD/packages/pg) to permit the latest version.
- [Changelog](https://github.com/brianc/node-postgres/blob/master/CHANGELOG.md)
- [Commits](https://github.com/brianc/node-postgres/commits/[email protected]/packages/pg)

---
updated-dependencies:
- dependency-name: pg
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -22,7 +22,7 @@
   ],
   "optionalDependencies": {
     "mysql2": "^3.6.5",
-    "pg": "^8.11.3",
+    "pg": "^8.13.0",
     "sqlite3": "^5.1.6",
     "mssql": "^10.0.1"
   },