Move to newer platform and IDEA gradle plugin

examples/intelliJPlugin/build.gradle.kts

@@ -1,11 +1,12 @@
 import org.jetbrains.compose.compose
 
 plugins {
-    id("org.jetbrains.intellij") version "0.6.5"
+    id("org.jetbrains.intellij") version "1.1.4"
     java
     kotlin("jvm") version "1.5.21"
     // __LATEST_COMPOSE_RELEASE_VERSION__
     id("org.jetbrains.compose") version "1.0.0-alpha1-rc1"
+    id("idea")
 }
 
 group = "org.example"
@@ -19,17 +20,12 @@ repositories {
 
 dependencies {
     implementation(compose.desktop.currentOs)
-    testCompile("junit", "junit", "4.12")
+    testImplementation("junit", "junit", "4.12")
 }
 
 // See https://github.com/JetBrains/gradle-intellij-plugin/
 intellij {
-    version = "2021.2"
-}
-tasks.getByName<org.jetbrains.intellij.tasks.PatchPluginXmlTask>("patchPluginXml") {
-    changeNotes("""
-      Add change notes here.<br>
-      <em>most HTML tags may be used</em>""")
+    version.set("2021.2")
 }
 
 tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {

examples/intelliJPlugin/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.9-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

examples/intelliJPlugin/src/main/kotlin/com/jetbrains/compose/widgets/LazyScrollable.kt

@@ -24,7 +24,6 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 
-@OptIn(ExperimentalFoundationApi::class)
 @Composable
 fun LazyScrollable() {
     MaterialTheme {
@@ -46,9 +45,7 @@ fun LazyScrollable() {
                 VerticalScrollbar(
                     modifier = Modifier.align(Alignment.CenterEnd).fillMaxHeight(),
                     adapter = rememberScrollbarAdapter(
-                        scrollState = state,
-                        itemCount = itemCount,
-                        averageItemSize = 37.dp // TextBox height + Spacer height
+                        scrollState = state
                     )
                 )
             }