0.2.3: implement awful hack to work around sveltejs/svelte#4899

Without this, unpredictable crashes may occur in seemingly random places.  This will be reverted as soon as sveltejs/svelte#4909 is merged.

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## 0.2.3
+- Implement hack to work around sveltejs/svelte#4899
+
 ## 0.2.2
 - Support `Tracker.autorun()` inside `onMount()`
 

package.js

@@ -1,6 +1,6 @@
 Package.describe({
   name: 'rdb:svelte-meteor-data',
-  version: '0.2.2',
+  version: '0.2.3',
   summary: 'Reactively track Meteor data inside Svelte components',
   git: 'https://github.com/rdb/svelte-meteor-data',
   documentation: 'README.md'

subscribe.js

@@ -4,7 +4,17 @@
  * - Makes the return value usable in {#await} blocks
  */
 
-import { current_component } from 'svelte/internal';
+import { current_component, set_current_component, tick } from 'svelte/internal';
+
+
+const promise = tick();
+const oldThen = promise.then;
+promise.then = function (fn) {
+  oldThen.call(promise, () => {
+    fn();
+    set_current_component(null);
+  });
+};
 
 _subscribe = Meteor.subscribe;
 Meteor.subscribe = function subscribe(name) {