Upgrade to Kotlin 1.9.20.

Closes #2159

Author: mp911de

parent/pom.xml

@@ -116,7 +116,7 @@
 		<!-- Deprecated: Use junit-vintage-engine and JUnit 4 is included as transitive dependency -->
 		<junit>4.13.2</junit>
 		<junit5>5.10.0</junit5>
-		<kotlin>1.9.10</kotlin>
+		<kotlin>1.9.20</kotlin>
 		<kotlin-coroutines>1.7.3</kotlin-coroutines>
 		<logback>1.4.1</logback>
 		<micrometer>1.12.0-RC1</micrometer>