Update gradle, Kotlin

Author: rfc2822

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 dokka = "1.9.20"
 junit4 = "4.13.2"
-kotlin = "2.0.0"
+kotlin = "2.1.20"
 okhttpVersion = "4.12.0"
 xpp3Version = "1.1.6"
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
 zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
+zipStorePath=wrapper/dists