rename to tick, remove callback interface

index.mjs

@@ -5,6 +5,6 @@ export {
 	afterUpdate,
 	setContext,
 	getContext,
-	nextTick,
+	tick,
 	createEventDispatcher
 } from './internal';

src/internal/scheduler.js

@@ -18,8 +18,7 @@ export function add_render_callback(fn) {
 	render_callbacks.push(fn);
 }
 
-export function nextTick(fn) {
-	if (fn) add_render_callback(fn);
+export function tick() {
 	schedule_update();
 	return update_promise;
 }

test/runtime/samples/lifecycle-next-tick/main.html

@@ -1,5 +1,5 @@
 <script>
-	import { nextTick } from 'svelte';
+	import { tick } from 'svelte';
 
 	export let snapshots = [];
 
@@ -14,7 +14,7 @@
 	function log() {
 		snapshots.push(`before ${buttons[0].textContent}`);
 
-		nextTick(() => {
+		tick().then(() => {
 			snapshots.push(`after ${buttons[0].textContent}`);
 		});
 	}