Merge pull request #94 from ashtanko/renovate/kotlin

Update kotlin to v2.1.20

Author: ashtanko

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 coroutines = "1.10.1"       # https://github.com/Kotlin/kotlinx.coroutines
 junit = "5.12.0"            # https://junit.org/junit5 | https://central.sonatype.com/artifact/org.junit.jupiter/junit-jupiter
-kotlin = "2.1.10"           # https://github.com/JetBrains/kotlin
+kotlin = "2.1.20"           # https://github.com/JetBrains/kotlin
 detekt = "1.23.8"           # https://github.com/detekt/detekt
 dokka = "2.0.0"             # https://github.com/Kotlin/dokka
 spotless = "7.0.2"          # https://github.com/diffplug/spotless