build: Bump kotlin.lib.version to 2.1.20 (#31)

Bumps `kotlin.lib.version` from 2.1.10 to 2.1.20.

Updates `org.jetbrains.kotlin:kotlin-stdlib` from 2.1.10 to 2.1.20
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.1.10...v2.1.20)

Updates `org.jetbrains.kotlin:kotlin-test-junit5` from 2.1.10 to 2.1.20
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.1.10...v2.1.20)

Updates `org.jetbrains.kotlin:kotlin-maven-plugin` from 2.1.10 to 2.1.20

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-test-junit5
  dependency-type: direct:development
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -47,7 +47,7 @@
     <kotlin.compiler.languageVersion>2.0</kotlin.compiler.languageVersion>
     <kotlin.compiler.apiVersion>${kotlin.compiler.languageVersion}</kotlin.compiler.apiVersion>
     <kotlin.compiler.jvmTarget>1.8</kotlin.compiler.jvmTarget>
-    <kotlin.lib.version>2.1.10</kotlin.lib.version>
+    <kotlin.lib.version>2.1.20</kotlin.lib.version>
     <java.version>8</java.version>
   </properties>