chore(provider): dont use store create helper

packages/svelte/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@xyflow/svelte",
-  "version": "0.0.7",
+  "version": "0.0.8",
   "description": "Svelte Flow - A highly customizable Svelte library for building node-based editors, workflow systems, diagrams and more.",
   "keywords": [
     "svelte",

packages/svelte/src/lib/components/SvelteFlowProvider/SvelteFlowProvider.svelte

@@ -1,9 +1,13 @@
 <script lang="ts">
-  import { onDestroy } from 'svelte';
+  import { onDestroy, setContext } from 'svelte';
 
-  import { createStoreContext } from '$lib/store';
+  import { createStore, key } from '$lib/store';
 
-  const store = createStoreContext();
+  const store = createStore();
+
+  setContext(key, {
+    getStore: () => store
+  });
 
   onDestroy(() => {
     store.reset();