Update plugin org.jetbrains.kotlin.jvm to v1.7.20

Author: renovate[bot]

build.gradle

@@ -1,7 +1,7 @@
 import org.apache.tools.ant.filters.ReplaceTokens
 
 plugins {
-    id 'org.jetbrains.kotlin.jvm' version '1.6.21'
+    id 'org.jetbrains.kotlin.jvm' version '1.7.20'
     id 'maven-publish'
     id 'com.github.johnrengelman.shadow' version '7.1.2'
     id 'org.jetbrains.dokka' version '1.6.21'