fix: upgrade pg-promise from 10.9.1 to 10.15.4 (#30)

Snyk has created this PR to upgrade pg-promise from 10.9.1 to 10.15.4.

See this package in npm:
https://www.npmjs.com/package/pg-promise

See this project in Snyk:
https://app.snyk.io/org/ludeknovy/project/eb264132-fe9b-451f-b7ee-2f3786f448dd?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

package.json

@@ -19,7 +19,7 @@
     "fastify": "^3.29.4",
     "fastify-swagger": "^4.13.0",
     "jsonwebtoken": "^9.0.0",
-    "pg-promise": "^10.9.1",
+    "pg-promise": "^10.15.4",
     "typescript": "^4.1.3",
     "uuid": "^8.3.2"
   },