Bump kotlin.version from 1.7.20 to 2.0.20

Bumps `kotlin.version` from 1.7.20 to 2.0.20.

Updates `org.jetbrains.kotlin:kotlin-stdlib-common` from 1.7.20 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@v1.7.20...v2.0.20)

Updates `org.jetbrains.kotlin:kotlin-stdlib` from 1.7.20 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@v1.7.20...v2.0.20)

Updates `org.jetbrains.kotlin:kotlin-reflect` from 1.7.20 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@v1.7.20...v2.0.20)

Updates `org.jetbrains.kotlin:kotlin-stdlib-jdk8` from 1.7.20 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@v1.7.20...v2.0.20)

Updates `org.jetbrains.kotlin:kotlin-maven-plugin` from 1.7.20 to 2.0.20

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib-common
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.jetbrains.kotlin:kotlin-reflect
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib-jdk8
  dependency-type: direct:production
  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] <[email protected]>

pom.xml

@@ -61,7 +61,7 @@
 
         <openjfx.version>17.0.10</openjfx.version>
         <java.version>8</java.version>
-        <kotlin.version>1.7.20</kotlin.version>
+        <kotlin.version>2.0.20</kotlin.version>
         <kotest.version>5.5.5</kotest.version>
         <junit5.version>5.8.2</junit5.version> <!-- needed by kotest -->