Merge pull request sveltejs#3 from halfnelson/hmr-native-fix

update native support

lib/svelte3/make-hot.js

@@ -2,17 +2,22 @@ const posixify = require('../posixify');
 
 const hotApi = require.resolve('./hot/hot-api.js');
 
+const nativeApi = require.resolve('../svelte-native/hot/proxy-adapter-native.js')
+
 const quote = JSON.stringify;
 
 function makeHot(id, code, hotOptions = {}) {
 	const options = JSON.stringify(hotOptions);
-	const replacement = `
+
+	let replacement = `
 		if (module.hot) {
+			${ hotOptions.native ? `global.__SvelteLoader__ProxyAdapter = require('${posixify(nativeApi)}').default` : ''}
 			const { applyHMR } = require('${posixify(hotApi)}');
 			$2 = applyHMR(${options}, ${quote(id)}, module.hot, $2);
 		}
 		export default $2;
 	`;
+
 	return code.replace(/(export default ([^;]*));/, replacement);
 }