build(deps): bump testcontainers from 1.19.8 to 1.20.0

Bumps `testcontainers` from 1.19.8 to 1.20.0.

Updates `org.testcontainers:junit-jupiter` from 1.19.8 to 1.20.0
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.8...1.20.0)

Updates `org.testcontainers:postgresql` from 1.19.8 to 1.20.0
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.8...1.20.0)

---
updated-dependencies:
- dependency-name: org.testcontainers:junit-jupiter
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:postgresql
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

gradle/libs.versions.toml

@@ -16,7 +16,7 @@ postgres = "42.7.1"
 restAssured = "5.5.0"
 swagger = "2.2.21"
 rsApi = "4.0.0"
-testcontainers = "1.19.8"
+testcontainers = "1.20.0"
 tink = "1.14.0"
 
 [libraries]