chore(deps-dev): bump @testcontainers/postgresql from 12.0.3 to 12.0.4 (#139)

Bumps [@testcontainers/postgresql](https://github.com/testcontainers/testcontainers-node) from 12.0.3 to 12.0.4.
- [Release notes](https://github.com/testcontainers/testcontainers-node/releases)
- [Commits](testcontainers/testcontainers-node@v12.0.3...v12.0.4)

---
updated-dependencies:
- dependency-name: "@testcontainers/postgresql"
  dependency-version: 12.0.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]