feat: Upgrade build.grandle

flutter_keyboard_visibility/android/build.gradle

@@ -1,44 +1,68 @@
-group 'com.jrai.flutter_keyboard_visibility'
-version '1.0'
+group = "com.jrai.flutter_keyboard_visibility"
+version = "1.0"
 
 buildscript {
+    ext.kotlin_version = "1.8.22"
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.4.2'
+        classpath("com.android.tools.build:gradle:8.1.0")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version")
     }
 }
 
-rootProject.allprojects {
+allprojects {
     repositories {
         google()
         mavenCentral()
     }
 }
 
-apply plugin: 'com.android.library'
+apply plugin: "com.android.library"
+apply plugin: "kotlin-android"
 
 android {
-    // Conditional for compatibility with AGP <4.2.
     if (project.android.hasProperty("namespace")) {
-        namespace 'com.jrai.flutter_keyboard_visibility'
+        namespace = "com.jrai.flutter_keyboard_visibility"
     }
 
-    compileSdkVersion 31
+    compileSdk = 34
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8
+    }
+
+    sourceSets {
+        main.java.srcDirs += "src/main/kotlin"
+        test.java.srcDirs += "src/test/kotlin"
+    }
 
     defaultConfig {
-        minSdkVersion 16
+        minSdk = 21
     }
 
-    lint {
-        disable 'InvalidPackage'
+    dependencies {
+        testImplementation("org.jetbrains.kotlin:kotlin-test")
+        testImplementation("org.mockito:mockito-core:5.0.0")
     }
 
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+    testOptions {
+        unitTests.all {
+            useJUnitPlatform()
+
+            testLogging {
+                events "passed", "skipped", "failed", "standardOut", "standardError"
+                outputs.upToDateWhen {false}
+                showStandardStreams = true
+            }
+        }
     }
 }