title: How to swap Spring Boot mapper from Jackson to kotlinx.serialization
body: <p>I would like my Spring Boot project to use kotlinx.serialization.  I can't figure out how to swap the mapper correctly... If I wanted to use GSON, I could just note it in the props via spring.http.converters.preferred-json-mapper=gson.</p>
  
  <p>Has anyone had success with this?</p>