hopefully fix tests on Windows

test/runtime-puppeteer/index.ts

@@ -109,8 +109,8 @@ describe('runtime (puppeteer)', () => {
 						load(id) {
 							if (id === 'main') {
 								return `
-									import SvelteComponent from '${__dirname}/samples/${dir}/main.svelte';
-									import config from '${__dirname}/samples/${dir}/_config.js';
+									import SvelteComponent from ${JSON.stringify(path.join(__dirname, 'samples', dir, 'main.svelte'))};
+									import config from ${JSON.stringify(path.join(__dirname, 'samples', dir, '_config.js'))};
 									import * as assert from 'assert';
 
 									export default async function (target) {
@@ -143,16 +143,16 @@ describe('runtime (puppeteer)', () => {
 													target,
 													window,
 												});
-												
+
 												component.$destroy();
-					
+
 												if (unhandled_rejection) {
 													throw unhandled_rejection;
 												}
 											} else {
 												component.$destroy();
 												assert.htmlEqual(target.innerHTML, '');
-						
+
 												if (unhandled_rejection) {
 													throw unhandled_rejection;
 												}