update packages and add valign

scripts/reveal.js/react/demo/vite.config.ts

@@ -0,0 +1,12 @@
+import { resolve } from 'path';
+import { defineConfig } from 'vite';
+import react from '@vitejs/plugin-react';
+
+export default defineConfig({
+	plugins: [react()],
+	resolve: {
+		alias: {
+			'@revealjs/react': resolve(__dirname, '../src/index.ts'),
+		},
+	},
+});