Android: maintenance (#724)

platform/android/build.gradle.kts

@@ -2,20 +2,22 @@ buildscript {
     repositories {
         google()
         jcenter()
+        mavenCentral()
     }
     dependencies {
         classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.21")
         classpath("com.android.tools.build:gradle:8.5.1")
-        classpath("com.beust:klaxon:5.0.1")
+        classpath("com.beust:klaxon:5.5")
     }
 }
 
 allprojects {
     repositories {
         google()
         jcenter()
+        mavenCentral()
         // maven(url = "https:// some custom repo")
-        val nativeDir = if (System.getProperty("os.name").toLowerCase().contains("windows")) {
+        val nativeDir = if (System.getProperty("os.name").lowercase().contains("windows")) {
             System.getenv("CORONA_ROOT")
         } else {
             "${System.getenv("HOME")}/Library/Application Support/Corona/Native/"
@@ -27,5 +29,5 @@ allprojects {
 }
 
 tasks.register<Delete>("clean") {
-    delete(rootProject.buildDir)
+    delete(rootProject.layout.buildDirectory.asFile.get())
 }