Bump testcontainersVersion from 1.17.6 to 1.18.2 (dajudge#219)

Bumps `testcontainersVersion` from 1.17.6 to 1.18.2.

Updates `org.testcontainers:testcontainers` from 1.17.6 to 1.18.2
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.18.2)

Updates `org.testcontainers:junit-jupiter` from 1.17.6 to 1.18.2
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.18.2)

---
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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -24,7 +24,7 @@ apply from: "${rootProject.projectDir}/signing.gradle"
 apply from: "${rootProject.projectDir}/codegen.gradle"
 
 ext {
-    testcontainersVersion = "1.18.0"
+    testcontainersVersion = "1.18.2"
     junitVersion = "5.9.3"
 }