Bump kotlin.version from 1.9.23 to 2.0.20 (#53)

Bumps `kotlin.version` from 1.9.23 to 2.0.20.

Updates `org.jetbrains.kotlin:kotlin-stdlib-jdk8` from 1.9.23 to 2.0.20
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.23...v2.0.20)

Updates `org.jetbrains.kotlin:kotlin-test` from 1.9.23 to 2.0.20
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.23...v2.0.20)

Updates `org.jetbrains.kotlin:kotlin-maven-plugin` from 1.9.23 to 2.0.20

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib-jdk8
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.jetbrains.kotlin:kotlin-test
  dependency-type: direct:development
  update-type: version-update:semver-major
- dependency-name: org.jetbrains.kotlin:kotlin-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

pom.xml

@@ -36,7 +36,7 @@
         <reflections.version>0.10.2</reflections.version>
         <xolstice-maven-protobuf.version>0.6.1</xolstice-maven-protobuf.version>
         <motd-os-maven.version>1.7.1</motd-os-maven.version>
-        <kotlin.version>1.9.23</kotlin.version>
+        <kotlin.version>2.0.20</kotlin.version>
         <ktorm.version>4.1.0</ktorm.version>
     </properties>