Merge pull request #170 from hoc081098/renovate/kotlin-monorepo

Update dependency org.jetbrains.kotlin:kotlin-gradle-plugin to v1.9.21

Author: hoc081098

build.gradle

@@ -1,6 +1,6 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = "1.7.20"
+    ext.kotlin_version = "1.9.21"
     repositories {
         google()
         mavenCentral()