Update Kotlin dependencies

Author: renovate[bot]

gradle.properties

@@ -5,7 +5,7 @@
 # Kotlin
 version=1.8.0-RC2-SNAPSHOT
 group=org.jetbrains.kotlinx
-kotlin_version=1.9.21
+kotlin_version=2.0.20
 # DO NOT rename this property without adapting kotlinx.train build chain:
 atomicfu_version=0.23.1
 
@@ -31,7 +31,7 @@ jna_version=5.9.0
 # Gradle
 jdk_toolchain_version=11
 animalsniffer_version=1.7.1
-shadow_version=7.1.2
+shadow_version=8.0.0
 #shadow_version=8.1.1 For Gradle 8, not compatible with Gradle 7
 
 # Android versions