chore: bump pg from 8.21.0 to 8.22.0 (#174)

Bumps [pg](https://github.com/brianc/node-postgres/tree/HEAD/packages/pg) from 8.21.0 to 8.22.0.
- [Changelog](https://github.com/brianc/node-postgres/blob/master/CHANGELOG.md)
- [Commits](https://github.com/brianc/node-postgres/commits/pg@8.22.0/packages/pg)

---
updated-dependencies:
- dependency-name: pg
  dependency-version: 8.22.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]