fix: upgrade pg from 8.8.0 to 8.9.0 (cameri#213)

Snyk has created this PR to upgrade pg from 8.8.0 to 8.9.0.

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

See this project in Snyk:
https://app.snyk.io/org/cameri/project/2f0c25a2-d08a-45e1-a6f4-84766cbed88d?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: Ricardo Arturo Cabral Mejía <me@ricardocabral.io>

package.json

@@ -127,7 +127,7 @@
     "joi": "17.7.0",
     "js-yaml": "4.1.0",
     "knex": "2.4.2",
-    "pg": "8.8.0",
+    "pg": "8.9.0",
     "pg-query-stream": "4.3.0",
     "ramda": "0.28.0",
     "redis": "4.6.2",