Prepare 1.5.1 release (#2297)upstream/v1.5.1

- Add changelog
- Update to Kotlin 1.8.21
- Update api dump
- Update yarn lock
- Update Gradle in integration test

3 files changed, 6 insertions, 6 deletions

diff --git a/formats/cbor/api/kotlinx-serialization-cbor.api b/formats/cbor/api/kotlinx-serialization-cbor.api
index 825c55f7..cc75fab8 100644
--- a/formats/cbor/api/kotlinx-serialization-cbor.api
+++ b/formats/cbor/api/kotlinx-serialization-cbor.api
@@ -1,7 +1,7 @@
 public abstract interface annotation class kotlinx/serialization/cbor/ByteString : java/lang/annotation/Annotation {
 }
 
-public final class kotlinx/serialization/cbor/ByteString$Impl : kotlinx/serialization/cbor/ByteString {
+public synthetic class kotlinx/serialization/cbor/ByteString$Impl : kotlinx/serialization/cbor/ByteString {
 	public fun <init> ()V
 }
 
diff --git a/formats/json/api/kotlinx-serialization-json.api b/formats/json/api/kotlinx-serialization-json.api
index fec5e1b5..663bd997 100644
--- a/formats/json/api/kotlinx-serialization-json.api
+++ b/formats/json/api/kotlinx-serialization-json.api
@@ -118,7 +118,7 @@ public abstract interface annotation class kotlinx/serialization/json/JsonClassD
 	public abstract fun discriminator ()Ljava/lang/String;
 }
 
-public final class kotlinx/serialization/json/JsonClassDiscriminator$Impl : kotlinx/serialization/json/JsonClassDiscriminator {
+public synthetic class kotlinx/serialization/json/JsonClassDiscriminator$Impl : kotlinx/serialization/json/JsonClassDiscriminator {
 	public fun <init> (Ljava/lang/String;)V
 	public final synthetic fun discriminator ()Ljava/lang/String;
 }
@@ -248,7 +248,7 @@ public abstract interface annotation class kotlinx/serialization/json/JsonNames
 	public abstract fun names ()[Ljava/lang/String;
 }
 
-public final class kotlinx/serialization/json/JsonNames$Impl : kotlinx/serialization/json/JsonNames {
+public synthetic class kotlinx/serialization/json/JsonNames$Impl : kotlinx/serialization/json/JsonNames {
 	public fun <init> ([Ljava/lang/String;)V
 	public final synthetic fun names ()[Ljava/lang/String;
 }
diff --git a/formats/protobuf/api/kotlinx-serialization-protobuf.api b/formats/protobuf/api/kotlinx-serialization-protobuf.api
index 65093b2c..4a369a0f 100644
--- a/formats/protobuf/api/kotlinx-serialization-protobuf.api
+++ b/formats/protobuf/api/kotlinx-serialization-protobuf.api
@@ -33,7 +33,7 @@ public abstract interface annotation class kotlinx/serialization/protobuf/ProtoN
 	public abstract fun number ()I
 }
 
-public final class kotlinx/serialization/protobuf/ProtoNumber$Impl : kotlinx/serialization/protobuf/ProtoNumber {
+public synthetic class kotlinx/serialization/protobuf/ProtoNumber$Impl : kotlinx/serialization/protobuf/ProtoNumber {
 	public fun <init> (I)V
 	public final synthetic fun number ()I
 }
@@ -41,7 +41,7 @@ public final class kotlinx/serialization/protobuf/ProtoNumber$Impl : kotlinx/ser
 public abstract interface annotation class kotlinx/serialization/protobuf/ProtoPacked : java/lang/annotation/Annotation {
 }
 
-public final class kotlinx/serialization/protobuf/ProtoPacked$Impl : kotlinx/serialization/protobuf/ProtoPacked {
+public synthetic class kotlinx/serialization/protobuf/ProtoPacked$Impl : kotlinx/serialization/protobuf/ProtoPacked {
 	public fun <init> ()V
 }
 
@@ -49,7 +49,7 @@ public abstract interface annotation class kotlinx/serialization/protobuf/ProtoT
 	public abstract fun type ()Lkotlinx/serialization/protobuf/ProtoIntegerType;
 }
 
-public final class kotlinx/serialization/protobuf/ProtoType$Impl : kotlinx/serialization/protobuf/ProtoType {
+public synthetic class kotlinx/serialization/protobuf/ProtoType$Impl : kotlinx/serialization/protobuf/ProtoType {
 	public fun <init> (Lkotlinx/serialization/protobuf/ProtoIntegerType;)V
 	public final synthetic fun type ()Lkotlinx/serialization/protobuf/ProtoIntegerType;
 }