Bump the dependencies group across 1 directory with 3 updates (#232)

Bumps the dependencies group with 3 updates in the /http4k-app directory: [io.mockk:mockk](https://github.com/mockk/mockk), [org.testcontainers:junit-jupiter](https://github.com/testcontainers/testcontainers-java) and jvm.


Updates `io.mockk:mockk` from 1.13.12 to 1.13.13
- [Release notes](https://github.com/mockk/mockk/releases)
- [Commits](mockk/mockk@1.13.12...1.13.13)

Updates `org.testcontainers:junit-jupiter` from 1.20.1 to 1.20.2
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.20.1...1.20.2)

Updates `jvm` from 2.0.20 to 2.0.21

---
updated-dependencies:
- dependency-name: io.mockk:mockk
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
- dependency-name: org.testcontainers:junit-jupiter
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
- dependency-name: jvm
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

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

http4k-app/build.gradle.kts

@@ -3,7 +3,7 @@ import org.gradle.api.tasks.testing.logging.TestLogEvent.PASSED
 import org.gradle.api.tasks.testing.logging.TestLogEvent.SKIPPED
 
 plugins {
-  kotlin("jvm") version "2.0.20"
+  kotlin("jvm") version "2.0.21"
   application
   id("com.github.johnrengelman.shadow") version "8.1.1"
   id("org.jlleitschuh.gradle.ktlint") version "12.1.1"
@@ -48,8 +48,8 @@ dependencies {
   testImplementation("org.junit.jupiter:junit-jupiter-api:$junitVersion")
   testImplementation("org.junit.jupiter:junit-jupiter-engine:$junitVersion")
 
-  testImplementation("io.mockk:mockk:1.13.12")
-  testImplementation("org.testcontainers:junit-jupiter:1.20.1")
+  testImplementation("io.mockk:mockk:1.13.13")
+  testImplementation("org.testcontainers:junit-jupiter:1.20.2")
 }
 
 java {