tracks/kotlin/exercises/etl/build.gradle in trackler-2.0.8.20 vs tracks/kotlin/exercises/etl/build.gradle in trackler-2.0.8.21

@@ -1,6 +1,6 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
   dependencies {
     classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"