Bump build to latest and add Kotlin to the build to help with converting Java to Kotlin.

Author: nedtwigg

durian-swt/build.gradle

@@ -1,3 +1,5 @@
+apply from: 干.file('base/kotlin.gradle')
+
 apply plugin: 'com.diffplug.eclipse.mavencentral'
 eclipseMavenCentral {
 	release SWT_VERSION, {
@@ -15,6 +17,7 @@ dependencies {
 	implementation "com.diffplug.durian:durian-concurrent:$VER_DURIAN"
 	compileOnly 'com.google.code.findbugs:jsr305:3.0.2'
 	compileOnly 'com.google.code.findbugs:annotations:3.0.1'
+	compileOnly "org.jetbrains:annotations:23.0.0"
 
 	testImplementation "junit:junit:$VER_JUNIT"
 	testImplementation "org.assertj:assertj-core:$VER_ASSERTJ"

settings.gradle

@@ -2,12 +2,13 @@ pluginManagement {
 	plugins {
 		id 'com.diffplug.blowdryer' version '1.5.1'
 		id 'com.diffplug.blowdryerSetup' version '1.5.1'
-		id 'com.diffplug.eclipse.mavencentral' version '3.35.0'
-		id 'com.diffplug.spotless' version '6.3.0'
+		id 'com.diffplug.eclipse.mavencentral' version '3.36.0'
+		id 'com.diffplug.spotless' version '6.4.1'
 		id 'com.diffplug.spotless-changelog' version '2.4.0'
-		id 'com.gradle.plugin-publish' version '0.20.0'
+		id 'com.gradle.plugin-publish' version '0.21.0'
 		id 'io.github.gradle-nexus.publish-plugin' version '1.1.0'
 		id 'org.jdrupes.mdoclet' version '1.0.10'
+		id 'org.jetbrains.kotlin.jvm' version '1.6.10'
 	}
 }
 plugins {
@@ -18,9 +19,10 @@ plugins {
 	id 'com.gradle.plugin-publish' apply false
 	id 'io.github.gradle-nexus.publish-plugin' apply false
 	id 'org.jdrupes.mdoclet' apply false
+	id 'org.jetbrains.kotlin.jvm' apply false
 }
 blowdryerSetup {
-	github 'diffplug/blowdryer-diffplug', 'tag', '5.2.0'
+	github 'diffplug/blowdryer-diffplug', 'tag', '5.2.1'
 	//devLocal '../blowdryer-diffplug'
 }