Bump testContainers from 1.18.3 to 1.20.1 (#44)

Bumps `testContainers` from 1.18.3 to 1.20.1.

Updates `org.testcontainers:testcontainers` from 1.18.3 to 1.20.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.18.3...1.20.1)

Updates `org.testcontainers:junit-jupiter` from 1.18.3 to 1.20.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.18.3...1.20.1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: chad-moller-target <[email protected]>

gradle/libs.versions.toml

@@ -12,7 +12,7 @@ healthMonitorInterface = "1.2.0"
 jupiter = "5.11.0"
 kotest = "5.6.2"
 mockk = "1.13.5"
-testContainers = "1.18.3"
+testContainers = "1.20.1"
 postgresql = "42.6.0"
 h2 = "2.2.220"