Bump Kotlin version

Related to DEP-519

Author: davidl-yoti

build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.6.21'
+    ext.kotlin_version = '1.8.10'
     repositories {
         google()
         mavenCentral()