Bump kotlin.version from 2.0.20 to 2.1.0 (#366)

Bumps `kotlin.version` from 2.0.20 to 2.1.0.

Updates `org.jetbrains.kotlin:kotlin-stdlib-jdk8` from 2.0.20 to 2.1.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.1.0/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.0.20...v2.1.0)

Updates `org.jetbrains.kotlin:kotlin-test` from 2.0.20 to 2.1.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.1.0/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.0.20...v2.1.0)

Updates `org.jetbrains.kotlin:kotlin-maven-plugin` from 2.0.20 to 2.1.0

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

pom.xml

@@ -42,7 +42,7 @@
         <junit.version>5.11.3</junit.version>
         <maven.source.plugin.version>3.3.1</maven.source.plugin.version>
         <maven.javadoc.plugin.version>3.11.1</maven.javadoc.plugin.version>
-        <kotlin.version>2.0.20</kotlin.version>
+        <kotlin.version>2.1.0</kotlin.version>
         <checkstyle.maven.plugin.version>3.5.0</checkstyle.maven.plugin.version>
         <checkstyle.version>10.20.2</checkstyle.version>
     </properties>