feat: upgrade to Kotlin 2.2.0 (#96)

Author: ianbotsf

build.gradle.kts

@@ -4,6 +4,7 @@
  */
 plugins {
     `maven-publish`
+    alias(libs.plugins.kotlin.jvm) apply false
 }
 
 val releaseVersion = findProperty("release.version") as? String

gradle.properties

@@ -1,4 +1 @@
 kotlin.code.style=official
-
-# kotlin
-kotlinVersion=2.1.0

gradle/libs.versions.toml

@@ -1,4 +1,5 @@
 [versions]
+kotlin-version = "2.2.0"
 ktlint = "1.3.0"
 smithy-version = "1.53.0"
 smithy-gradle-plugin-version = "1.1.0"
@@ -16,4 +17,5 @@ smithy-gradle-base-plugin = { module = "software.amazon.smithy.gradle:smithy-bas
 junit-jupiter = { module = "org.junit.jupiter:junit-jupiter", version.ref = "junit-version" }
 
 [plugins]
+kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin-version" }
 plugin-publish = { id = "com.gradle.plugin-publish", version = "1.3.1"}

settings.gradle.kts

@@ -9,12 +9,6 @@ pluginManagement {
         mavenCentral()
         gradlePluginPortal()
     }
-
-    val kotlinVersion: String by settings
-    // configure default plugin versions
-    plugins {
-        id("org.jetbrains.kotlin.jvm") version kotlinVersion
-    }
 }
 
 dependencyResolutionManagement {