Prepare 1.6.0-RC release (#2391)

Author: sandwwraith

CHANGELOG.md

@@ -1,4 +1,36 @@
 
+1.6.0-RC / 2023-08-03
+==================
+
+This release is based on the Kotlin 1.9.0.
+
+### Removal of Legacy JS target
+Some time ago, in Kotlin 1.8, [JS IR compiler was promoted to stable and old JS compiler was deprecated](https://kotlinlang.org/docs/whatsnew18.html#stable-js-ir-compiler-backend).
+Kotlin 1.9 promotes the usage of deprecated JS compiler to an error. As a result, kotlinx.serialization no longer builds with the legacy compiler
+and does not distribute artifacts for it. You can read the migration guide for JS IR compiler [here](https://kotlinlang.org/docs/js-ir-migration.html).
+
+Also pay attention to the fact that Kotlin/Native also has some [deprecated targets](https://kotlinlang.org/docs/native-target-support.html#deprecated-targets) 
+that are going to be removed in the Kotlin 1.9.20. Therefore, kotlinx.serialization 1.6.0-RC and 1.6.0 are likely the last releases that support these targets.
+
+### Case insensitivity for enums in Json
+
+This release features a new configuration flag for Json: `decodeEnumsCaseInsensitive`
+that allows you to decode enum values in a case-insensitive manner.
+For example, when decoding `enum class Foo { VALUE_A , VALUE_B}` both inputs `"value_a"` and `"value_A"` will yield `Foo.VALUE_A`.
+You can read more about this feature in the documentation and corresponding [PR](https://github.com/Kotlin/kotlinx.serialization/pull/2345).
+
+### Other bugfixes and enhancements
+
+  * Add support to decode numeric literals containing an exponent (#2227) (thanks to [Roberto Blázquez](https://github.com/xBaank))
+  * Fix NoSuchMethodError related to Java 8 API compatibility (#2328, #2350) (thanks to [Björn Kautler](https://github.com/Vampire))
+  * Changed actual FormatLanguage annotation for JS and Native to avoid problems with duplicating org.intellij.lang.annotations.Language (#2390, #2379)
+  * Fix error triggered by 'consume leading class discriminator' polymorphic parsing optimization (#2362)
+  * Fix runtime error with Serializer for Nothing on the JS target (#2330) (thanks to [Shreck Ye](https://github.com/ShreckYe))
+  * Fix beginStructure in JsonTreeDecoder when inner structure descriptor is same as outer (#2346) (thanks to [Ugljesa Jovanovic](https://github.com/ionspin))
+  * Actualize 'serializer not found' platform-specific message (#2339)
+  * Fixed regression with serialization using a list parametrized with contextual types (#2331)
+
+
 1.5.1 / 2023-05-11
 ==================
 This release contains an important Native targets overhaul, as well as numerous enhancements and bugfixes.

README.md

@@ -4,8 +4,8 @@
 [![JetBrains official project](https://jb.gg/badges/official.svg)](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub)
 [![GitHub license](https://img.shields.io/badge/license-Apache%20License%202.0-blue.svg?style=flat)](http://www.apache.org/licenses/LICENSE-2.0)
 [![TeamCity build](https://img.shields.io/teamcity/http/teamcity.jetbrains.com/s/KotlinTools_KotlinxSerialization_Ko.svg)](https://teamcity.jetbrains.com/viewType.html?buildTypeId=KotlinTools_KotlinxSerialization_Ko&guest=1)
-[![Kotlin](https://img.shields.io/badge/kotlin-1.8.21-blue.svg?logo=kotlin)](http://kotlinlang.org)
-[![Maven Central](https://img.shields.io/maven-central/v/org.jetbrains.kotlinx/kotlinx-serialization-core/1.5.1)](https://central.sonatype.com/artifact/org.jetbrains.kotlinx/kotlinx-serialization-core/1.5.1)
+[![Kotlin](https://img.shields.io/badge/kotlin-1.9.0-blue.svg?logo=kotlin)](http://kotlinlang.org)
+[![Maven Central](https://img.shields.io/maven-central/v/org.jetbrains.kotlinx/kotlinx-serialization-core/1.6.0-RC)](https://central.sonatype.com/artifact/org.jetbrains.kotlinx/kotlinx-serialization-core/1.6.0-RC)
 [![KDoc link](https://img.shields.io/badge/API_reference-KDoc-blue)](https://kotlinlang.org/api/kotlinx.serialization/)
 [![Slack channel](https://img.shields.io/badge/chat-slack-blue.svg?logo=slack)](https://kotlinlang.slack.com/messages/serialization/)
 
@@ -92,17 +92,17 @@ Kotlin DSL:
 
 ```kotlin
 plugins {
-    kotlin("jvm") version "1.8.21" // or kotlin("multiplatform") or any other kotlin plugin
-    kotlin("plugin.serialization") version "1.8.21"
+    kotlin("jvm") version "1.9.0" // or kotlin("multiplatform") or any other kotlin plugin
+    kotlin("plugin.serialization") version "1.9.0"
 }
 ```       
 
 Groovy DSL:
 
 ```gradle
 plugins {
-    id 'org.jetbrains.kotlin.multiplatform' version '1.8.21'
-    id 'org.jetbrains.kotlin.plugin.serialization' version '1.8.21'
+    id 'org.jetbrains.kotlin.multiplatform' version '1.9.0'
+    id 'org.jetbrains.kotlin.plugin.serialization' version '1.9.0'
 }
 ```
 
@@ -119,7 +119,7 @@ buildscript {
     repositories { mavenCentral() }
 
     dependencies {
-        val kotlinVersion = "1.8.21"
+        val kotlinVersion = "1.9.0"
         classpath(kotlin("gradle-plugin", version = kotlinVersion))
         classpath(kotlin("serialization", version = kotlinVersion))
     }
@@ -130,7 +130,7 @@ Groovy DSL:
 
 ```gradle
 buildscript {
-    ext.kotlin_version = '1.8.21'
+    ext.kotlin_version = '1.9.0'
     repositories { mavenCentral() }
 
     dependencies {
@@ -159,7 +159,7 @@ repositories {
 }
 
 dependencies {
-    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.5.1")
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.0-RC")
 }
 ```
 
@@ -171,7 +171,7 @@ repositories {
 }
 
 dependencies {
-    implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.5.1"
+    implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.0-RC"
 }
 ```
 
@@ -261,8 +261,8 @@ Ensure the proper version of Kotlin and serialization version:
 
 ```xml
 <properties>
-    <kotlin.version>1.8.21</kotlin.version>
-    <serialization.version>1.5.1</serialization.version>
+    <kotlin.version>1.9.0</kotlin.version>
+    <serialization.version>1.6.0-RC</serialization.version>
 </properties>
 ```