Add subscribe type definitions

Author: zerodevx

docs/App.svelte

@@ -7,6 +7,7 @@ import camelCase from 'camelcase'
 import Prism from 'prismjs'
 
 // Hoist to `window` for debug
+// @ts-ignore
 window.toast = toast
 
 let selected
@@ -19,6 +20,7 @@ const handleClick = (btn) => {
   selected = btn.name
   code = btn.code
   btn.run()
+  // @ts-ignore
   window.gtag('event', 'toast', { event_label: btn.name })
 }
 

jsconfig.json

@@ -1,6 +1,9 @@
 {
   "compilerOptions": {
-    "baseUrl": "."
+    "baseUrl": ".",
+    "allowJs": true,
+    "checkJs": true,
+    "strict": false
   },
   "include": ["src/index.d.ts"]
 }

src/index.d.ts

@@ -1,6 +1,7 @@
 // index.d.ts
 import type { SvelteComponent } from 'svelte'
 import type { FlyParams } from 'svelte/types/runtime/transition/index'
+import type { Subscriber, Unsubscriber } from 'svelte/types/runtime/store/index'
 
 declare module '@zerodevx/svelte-toast'
 
@@ -53,4 +54,5 @@ declare namespace toast {
   export function pop(arg?: any): void
   export function set(id: number, options?: SvelteToastOptions): void
   export function set(options: SvelteToastOptions): void
+  export function subscribe(run: Subscriber): Unsubscriber
 }