fix: address intro transition bugs

Author: trueadm

packages/svelte/tests/runtime-legacy/samples/transition-js-each-block-intro-outro/_config.js

@@ -34,7 +34,7 @@ export default test({
 
 		component.visible = true;
 
-		raf.tick(80);
+		raf.tick(100);
 		assert.equal(divs[0].foo, 1);
 		assert.equal(divs[1].foo, 1);
 		assert.equal(divs[2].foo, 1);