Build: suppress version and JVM target warnings

To further reduce the output on each build.

libraries/tools/kotlin-allopen/build.gradle

@@ -26,7 +26,9 @@ dependencies {
 tasks.withType(project.compileKotlin.class) {
     kotlinOptions.languageVersion = "1.3"
     kotlinOptions.apiVersion = "1.3"
-    kotlinOptions.freeCompilerArgs += ["-Xskip-prerelease-check", "-Xskip-runtime-version-check"]
+    kotlinOptions.freeCompilerArgs += [
+            "-Xskip-prerelease-check", "-Xskip-runtime-version-check", "-Xsuppress-version-warnings"
+    ]
 }
 
 jar {

libraries/tools/kotlin-gradle-plugin-api/build.gradle.kts

@@ -26,7 +26,9 @@ tasks {
     withType<KotlinCompile> {
         kotlinOptions.languageVersion = "1.3"
         kotlinOptions.apiVersion = "1.3"
-        kotlinOptions.freeCompilerArgs += listOf("-Xskip-prerelease-check")
+        kotlinOptions.freeCompilerArgs += listOf(
+            "-Xskip-prerelease-check", "-Xsuppress-version-warnings"
+        )
     }
 
     named<Jar>("jar") {

libraries/tools/kotlin-gradle-plugin-model/build.gradle.kts

@@ -22,7 +22,9 @@ tasks {
     withType<KotlinCompile> {
         kotlinOptions.languageVersion = "1.3"
         kotlinOptions.apiVersion = "1.3"
-        kotlinOptions.freeCompilerArgs += listOf("-Xskip-prerelease-check")
+        kotlinOptions.freeCompilerArgs += listOf(
+            "-Xskip-prerelease-check", "-Xsuppress-version-warnings"
+        )
     }
 
     named<Jar>("jar") {

libraries/tools/kotlin-gradle-plugin/build.gradle.kts

@@ -124,7 +124,9 @@ tasks {
         kotlinOptions.jdkHome = rootProject.extra["JDK_18"] as String
         kotlinOptions.languageVersion = "1.3"
         kotlinOptions.apiVersion = "1.3"
-        kotlinOptions.freeCompilerArgs += listOf("-Xskip-prerelease-check")
+        kotlinOptions.freeCompilerArgs += listOf(
+            "-Xskip-prerelease-check", "-Xsuppress-version-warnings"
+        )
     }
 
     named<ProcessResources>("processResources") {

libraries/tools/kotlin-noarg/build.gradle

@@ -32,7 +32,9 @@ dependencies {
 tasks.withType(project.compileKotlin.class) {
     kotlinOptions.languageVersion = "1.3"
     kotlinOptions.apiVersion = "1.3"
-    kotlinOptions.freeCompilerArgs += ["-Xskip-prerelease-check", "-Xskip-runtime-version-check"]
+    kotlinOptions.freeCompilerArgs += [
+            "-Xskip-prerelease-check", "-Xskip-runtime-version-check", "-Xsuppress-version-warnings"
+    ]
 }
 
 jar {

libraries/tools/kotlin-sam-with-receiver/build.gradle

@@ -32,7 +32,9 @@ dependencies {
 tasks.withType(project.compileKotlin.class) {
     kotlinOptions.languageVersion = "1.3"
     kotlinOptions.apiVersion = "1.3"
-    kotlinOptions.freeCompilerArgs += ["-Xskip-prerelease-check", "-Xskip-runtime-version-check"]
+    kotlinOptions.freeCompilerArgs += [
+            "-Xskip-prerelease-check", "-Xskip-runtime-version-check", "-Xsuppress-version-warnings"
+    ]
 }
 
 jar {