docs: adding some demos to the readme

Author: erunion

README.md

@@ -24,3 +24,14 @@ const url = 'data:image/png;name=owlbert-shrub.png;base64,iVBORw0KGgoAAAANSUhEUg
 console.log(validate(url)); // true
 console.log(parse(url));
 ```
+
+```js
+{
+  mediaType: 'image/png;name=owlbert-shrub.png',
+  contentType: 'image/png',
+  name: 'owlbert-shrub.png',
+  base64: true,
+  data: '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',
+  toBuffer: [Function (anonymous)]
+}
+```