Bump postgresql from 1.8.2 to 1.8.3
Bump postgresql from 1.8.2 to 1.8.3

Bumps [postgresql](https://github.com/testcontainers/testcontainers-java) from 1.8.2 to 1.8.3.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/master/CHANGELOG.md)
- [Commits](https://github.com/testcontainers/testcontainers-java/compare/1.8.2...1.8.3)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
zalando-stups/fullstop,zalando-stups/fullstop,zalando-stups/fullstop