Fix samples

samples/SkiaJsSample/src/jsMain/kotlin/org/jetbrains/skiko/sample/js/App.kt

@@ -10,10 +10,11 @@ import org.w3c.dom.HTMLCanvasElement
 
 fun main() {
     onWasmReady {
-        val paint = Paint()
-        paint.setColor4f(Color4f(0f, 1f, 0f, 1.0f))
-        paint.setMode(PaintMode.FILL)
-        paint.setAntiAlias(true)
+        val paint = Paint().apply {
+            color4f = Color4f(0f, 1f, 0f, 1.0f)
+            mode = PaintMode.FILL
+            isAntiAlias = true
+        }
 
         val canvas = document.getElementById("c") as HTMLCanvasElement
         canvas.getContext("webgl")
@@ -34,7 +35,7 @@ fun main() {
 
         fun draw() {
             surface.canvas.drawCircle(50f, 50f, 25f, paint)
-            paint.setColor4f(Color4f(1f, 1f, 0f, 1.0f))
+            paint.color4f = Color4f(1f, 1f, 0f, 1.0f)
             surface.canvas.drawCircle(100f, 100f, 10f, paint)
             surface.canvas.drawCircle(200f, 200f, 30f, paint)
             window.requestAnimationFrame { draw() }

samples/SkiaNativeSample/src/nativeMain/kotlin/org.jetbrains.skiko.sample.native/App.kt

@@ -49,8 +49,7 @@ class Renderer(
 fun displayScene(renderer: Renderer, nanoTime: Long) {
     val canvas = renderer.canvas!!
 
-    val paint = Paint()
-    paint.setColor(Color.GREEN)
+    val paint = Paint().apply { color = Color.GREEN}
 
     canvas.clear(Color.RED)