Update all dependencies (#133)

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

Author: renovate[bot]

build.gradle

@@ -16,7 +16,7 @@
 
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = "2.1.20"
+    ext.kotlin_version = "2.1.21"
     repositories {
         google()
         mavenCentral()
@@ -31,8 +31,8 @@ buildscript {
 }
 
 plugins {
-    id 'org.jetbrains.kotlin.android' version '2.1.20' apply false
-    id 'com.google.devtools.ksp' version '2.1.20-2.0.1' apply false
+    id 'org.jetbrains.kotlin.android' version '2.1.21' apply false
+    id 'com.google.devtools.ksp' version '2.1.21-2.0.1' apply false
 }
 
 allprojects {