Upgrade to Kotlin 2.1 #1203
Description
Kotlin 2.x is the baseline for Spring projects, see https://github.com/spring-projects/spring-framework/wiki/Spring-Framework-7.0-Release-Notes#upgrading-from-spring-framework-62
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Kotlin 2.x is the baseline for Spring projects, see https://github.com/spring-projects/spring-framework/wiki/Spring-Framework-7.0-Release-Notes#upgrading-from-spring-framework-62