Bump kotlin from 2.0.10 to 2.0.21 (#12)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Oleg Smirnov <smirnov_oleg96@mail.ru>
Co-authored-by: Oleg Smirnov <oleg31101996@gmail.com>

Author: dependabot[bot]

gradle.properties

@@ -1,5 +1,4 @@
 kotlin.code.style=official
-kotlin.js.compiler=ir
 # to compile all generated tests
 kotlin.daemon.jvmargs=-Xmx3G
 org.gradle.jvmargs=-Xmx1G

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
-kotlin = "2.0.10"
-kotest = "5.9.1"
+kotlin = "2.0.21"
+kotest = "6.0.0.M1"
 serialization = "1.7.3"
 graphql = "8.1.0"