Update Kotlin Compiler to v2.1.20 (#65)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 # tools & plugins
-kotlin = "2.1.10"
+kotlin = "2.1.20"
 android-gradle = "8.9.2"
 
 # android's compileSdk, targetSdk, minSdk