Upgrade to Kotlin 1.9.21.

See #2187

Author: mp911de

parent/pom.xml

@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 
 	<!--
 
@@ -116,7 +115,7 @@
 		<!-- Deprecated: Use junit-vintage-engine and JUnit 4 is included as transitive dependency -->
 		<junit>4.13.2</junit>
 		<junit5>5.10.1</junit5>
-		<kotlin>1.9.20</kotlin>
+		<kotlin>1.9.21</kotlin>
 		<kotlin-coroutines>1.7.3</kotlin-coroutines>
 		<logback>1.4.13</logback>
 		<micrometer>1.12.1</micrometer>
@@ -1440,4 +1439,4 @@
 		</repository>
 	</repositories>
 
-</project>
+</project>