Complete the SvelteKit migration

package.json

@@ -11,7 +11,7 @@
 	},
 	"devDependencies": {
 		"@sveltejs/adapter-static": "1.0.0-next.41",
-		"@sveltejs/kit": "1.0.0-next.461",
+		"@sveltejs/kit": "^1.0.0-next.504",
 		"@typescript-eslint/eslint-plugin": "^5.36.1",
 		"@typescript-eslint/parser": "^5.36.1",
 		"eslint": "^8.23.0",
@@ -20,12 +20,12 @@
 		"prettier": "^2.7.1",
 		"prettier-plugin-svelte": "^2.7.0",
 		"sass": "^1.54.4",
-		"svelte": "3.49.0",
+		"svelte": "^3.50.1",
 		"svelte-check": "^2.9.0",
 		"svelte-preprocess": "^4.10.7",
 		"tslib": "^2.4.0",
 		"typescript": "4.8.2",
-		"vite": "3.0.9"
+		"vite": "^3.1.4"
 	},
 	"homepage": "https://bookit.leveluptutorials.com",
 	"license": "ISC",
@@ -40,7 +40,6 @@
 		"lint": "prettier --ignore-path .gitignore --check --plugin-search-dir=. . && eslint --ignore-path .gitignore .",
 		"package": "svelte-kit package",
 		"package:watch": "watch 'pnpm package' src",
-		"prepare": "svelte-kit sync",
 		"preview": "vite preview"
 	},
 	"type": "module",

src/routes/+layout.svelte

@@ -0,0 +1,6 @@
+<script lang="ts">
+	import '../demo/base.css';
+	export const prerender = true;
+</script>
+
+<slot />

svelte.config.js

@@ -8,9 +8,6 @@ const config = {
 	preprocess: preprocess(),
 
 	kit: {
-		prerender: {
-			default: true
-		},
 		adapter: adapter()
 	}
 };