feat: upgrade to svelte 4

package.json

@@ -18,7 +18,7 @@
     "type": "git",
     "url": "git+https://git.resultium.net/public/svelte-headlessui.git"
   },
-  "version": "1.0.0",
+  "version": "1.0.1",
   "scripts": {
     "dev": "vite dev",
     "build": "vite build",
@@ -31,7 +31,7 @@
     "test": "jest"
   },
   "peerDependencies": {
-    "svelte": "^3.47.0"
+    "svelte": "^4.2.12"
   },
   "devDependencies": {
     "@babel/cli": "^7.23.9",
@@ -76,5 +76,14 @@
     "typescript": "^5.3.3",
     "vite": "^4.5.2"
   },
-  "type": "module"
+  "type": "module",
+  "files": [
+    "package"
+  ],
+  "svelte": "index.js",
+  "exports": {
+    ".": {
+      "svelte": "./index.js"
+    }
+  }
 }