Gradle, android -> androidTarget (#17)

androidApp/build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
 }
 
 kotlin {
-    android()
+    androidTarget()
     sourceSets {
         val androidMain by getting {
             dependencies {

shared/build.gradle.kts

@@ -6,7 +6,7 @@ plugins {
 }
 
 kotlin {
-    android()
+    androidTarget()
 
     jvm("desktop")