Use proposed drawableTouching interface from render (#1419)

* use new drawableTouching interface from render

* Fix mock renderer for new API call

* with lint fix

src/sprites/rendered-target.js

@@ -799,15 +799,7 @@ class RenderedTarget extends Target {
      */
     isTouchingPoint (x, y) {
         if (this.renderer) {
-            // @todo: Update once pick is in Scratch coordinates.
+            return this.renderer.drawableTouching(this.drawableID, x, y);
-            // Limits test to this Drawable, so this will return true
-            // even if the clone is obscured by another Drawable.
-            const pickResult = this.runtime.renderer.pick(
-                x, y,
-                null, null,
-                [this.drawableID]
-            );
-            return pickResult === this.drawableID;
         }
         return false;
     }

test/fixtures/fake-renderer.js

@@ -30,6 +30,10 @@ FakeRenderer.prototype.pick = function (x, y, a, b, d) { // eslint-disable-line
     return true;
 };
 
+FakeRenderer.prototype.drawableTouching = function (d, x, y, w, h) { // eslint-disable-line no-unused-vars
+    return true;
+};
+
 FakeRenderer.prototype.isTouchingColor = function (d, c) { // eslint-disable-line no-unused-vars
     return true;
 };