fix(core): update

test/test.ts

@@ -8,4 +8,25 @@ tap.test('should create a feedVersion', async () => {
   expect(testSmartFeed).to.be.instanceOf(smartfeed.Smartfeed);
 });
 
+tap.test('should create a feed', async () => {
+  const feed = testSmartFeed.createFeed({
+    domain: 'central.eu',
+    title: 'central.eu - ideas for Europe',
+    category: 'Politics',
+    company: 'Lossless GmbH',
+    companyDomain: 'https://lossless.com',
+    companyEmail: 'hello@lossless.com',
+    description: 'ideas for Europe',
+  });
+  feed.addItem({
+    title: 'A better European Union',
+    authorName: 'Phil',
+    imageUrl: 'https://central.eu/someimage.png',
+    timestamp: Date.now(),
+    url: 'https://central.eu/article/somearticle'
+  });
+  const rssFeed = feed.exportRssFeedString();
+  console.log(rssFeed);
+});
+
 tap.start();