Update deprecated AGP properties (#770)

* Update deprecated AGP properties

* Remove unused suppression

buildSrc/src/main/kotlin/AndroidConfig.kt

@@ -1,6 +1,5 @@
 object AndroidConfig {
     const val compileSdk = 34
     const val minSdk = 21
-    @Suppress("UNUSED")
     const val targetSdk = 34
 }

common.gradle

@@ -4,7 +4,7 @@ apply plugin: 'kotlinx-serialization'
 apply plugin: 'org.jmailen.kotlinter'
 
 android {
-    compileSdkVersion AndroidConfig.compileSdk
+    compileSdk AndroidConfig.compileSdk
 
     namespace "eu.kanade.tachiyomi.extension"
     sourceSets {
@@ -17,8 +17,8 @@ android {
     }
 
     defaultConfig {
-        minSdkVersion AndroidConfig.minSdk
-        targetSdkVersion AndroidConfig.targetSdk
+        minSdk AndroidConfig.minSdk
+        targetSdk AndroidConfig.targetSdk
         applicationIdSuffix project.parent.name + "." + project.name
         versionCode extVersionCode
         versionName project.ext.properties.getOrDefault("libVersion", "1.4") + ".$extVersionCode"