Release 4.2.0

- PUBLISH_VERSION 4.1.1 -> 4.2.0
- CHANGELOG: promote [Unreleased] -> [4.2.0] (2026-06-08) + compare link
- README: bump install snippets to 4.2.0

Adds the Android target for tree-structure and tree-structure-compose,
the default TreeNodeRow composable + LazyTree(label=...) overload, and a
runnable Android sample. All additive, no breaking changes.

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project are documented here. The format is based on
 [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project adheres to
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [4.2.0] - 2026-06-08
 
 ### Added
 - **Android target.** The core `tree-structure` module and `tree-structure-compose` now publish an
@@ -112,7 +112,7 @@ A breaking release that cleans up the core API and enforces an explicit public s
 ## [3.1.3]
 - iOS targets and Maven Central (Sonatype Central Portal) publishing.
 
-[Unreleased]: https://github.com/AdrianKuta/Tree-Data-Structure/compare/v4.1.1...HEAD
+[4.2.0]: https://github.com/AdrianKuta/Tree-Data-Structure/compare/v4.1.1...v4.2.0
 [4.1.1]: https://github.com/AdrianKuta/Tree-Data-Structure/compare/v4.1.0...v4.1.1
 [4.1.0]: https://github.com/AdrianKuta/Tree-Data-Structure/compare/v4.0.0...v4.1.0
 [4.0.0]: https://github.com/AdrianKuta/Tree-Data-Structure/compare/v3.4.0...v4.0.0

README.md

@@ -30,14 +30,14 @@ Gradle (Kotlin DSL):
 ```kotlin
 // commonMain for KMP projects, or any sourceSet/module where you need it
 dependencies {
-    implementation("com.github.adriankuta:tree-structure:4.1.1") // latest version is on the badge above
+    implementation("com.github.adriankuta:tree-structure:4.2.0") // latest version is on the badge above
 }
 ```
 
 Gradle (Groovy):
 ```groovy
 dependencies {
-    implementation "com.github.adriankuta:tree-structure:4.1.1"
+    implementation "com.github.adriankuta:tree-structure:4.2.0"
 }
 ```
 
@@ -46,7 +46,7 @@ Maven:
 <dependency>
   <groupId>com.github.adriankuta</groupId>
   <artifactId>tree-structure</artifactId>
-  <version>4.1.1</version>
+  <version>4.2.0</version>
 </dependency>
 ```
 
@@ -160,7 +160,7 @@ that depends on the core.
 `@Serializable` directly. Convert to and from the acyclic `TreeNodeDto` instead.
 
 ```kotlin
-implementation("com.github.adriankuta:tree-structure-serialization:4.1.1")
+implementation("com.github.adriankuta:tree-structure-serialization:4.2.0")
 ```
 ```kotlin
 val json = Json.encodeToString(root.toDto())
@@ -172,7 +172,7 @@ val restored = Json.decodeFromString<TreeNodeDto<String>>(json).toTreeNode()
 Traverse a tree as a cold `Flow`, which is handy inside coroutine and `ViewModel` pipelines.
 
 ```kotlin
-implementation("com.github.adriankuta:tree-structure-coroutines:4.1.1")
+implementation("com.github.adriankuta:tree-structure-coroutines:4.2.0")
 ```
 ```kotlin
 root.preOrderFlow().collect { println(it.value) }
@@ -185,7 +185,7 @@ A `LazyTree` composable for Compose Multiplatform (JVM/desktop, Android, iOS, Wa
 nodes are composed.
 
 ```kotlin
-implementation("com.github.adriankuta:tree-structure-compose:4.1.1")
+implementation("com.github.adriankuta:tree-structure-compose:4.2.0")
 ```
 
 For the common case, the no-content overload renders each node with the built-in `TreeNodeRow`
@@ -217,7 +217,7 @@ subtrees are reused, so updates are cheap and old roots stay valid. Backed by
 `kotlinx.collections.immutable`.
 
 ```kotlin
-implementation("com.github.adriankuta:tree-structure-immutable:4.1.1")
+implementation("com.github.adriankuta:tree-structure-immutable:4.2.0")
 ```
 ```kotlin
 val root = ImmutableTreeNode("World").addChild(ImmutableTreeNode("Europe"))

build.gradle.kts

@@ -16,7 +16,7 @@ plugins {
 
 val PUBLISH_GROUP_ID = "com.github.adriankuta"
 val PUBLISH_ARTIFACT_ID = "tree-structure"    // base artifact; KMP will add -jvm, -ios*, etc.
-val PUBLISH_VERSION = "4.1.1"
+val PUBLISH_VERSION = "4.2.0"
 
 val snapshot: String? by project