Update kotlin

Author: renovate-bot

pom.xml

@@ -14,8 +14,8 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
-        <kotlin.version>1.6.10</kotlin.version>
-        <kotlin-coroutines.version>1.6.0-native-mt</kotlin-coroutines.version>
+        <kotlin.version>1.6.21</kotlin.version>
+        <kotlin-coroutines.version>1.6.1-native-mt</kotlin-coroutines.version>
         <jackson.version>2.13.2.20220328</jackson.version>
         <graphql-java.version>17.3</graphql-java.version>
         <reactive-streams.version>1.0.3</reactive-streams.version>