switch to kotlin gradle DSL

Author: Patrick Jackson

build.gradle

@@ -28,7 +28,3 @@ allprojects {
         maven { url "https://kotlin.bintray.com/kotlinx" }
     }
 }
-
-task clean(type: Delete) {
-    delete rootProject.buildDir
-}

common/build.gradle

@@ -0,0 +1,45 @@
+import org.gradle.internal.impldep.org.apache.maven.Maven
+
+plugins {
+    kotlin("multiplatform")
+    `maven-publish`
+}
+
+
+repositories {
+    mavenCentral()
+}
+
+kotlin {
+    targets {
+        jvm()
+        js {
+            browser()
+            nodejs()
+        }
+        linuxX64()
+        linuxArm32Hfp()
+        macosX64()
+        mingwX64()
+        iosArm64()
+        iosArm32()
+        iosX64()
+    }
+    sourceSets {
+        commonTest {
+            kotlin.srcDir("src/test/kotlin")
+        }
+    }
+}
+
+dependencies {
+    commonMainImplementation("org.jetbrains.kotlin:kotlin-stdlib")
+    commonTestImplementation("org.jetbrains.kotlin:kotlin-test-annotations-common")
+    commonTestImplementation("org.jetbrains.kotlin:kotlin-test-common")
+
+    "jvmMainImplementation"("org.jetbrains.kotlin:kotlin-stdlib")
+    "jvmTestImplementation"("org.jetbrains.kotlin:kotlin-test-junit")
+
+    "jsMainImplementation"("org.jetbrains.kotlin:kotlin-stdlib-js")
+    "jsTestImplementation"("org.jetbrains.kotlin:kotlin-test-js")
+}