Fix bracket order typo

Author: adamski

README.md

@@ -125,11 +125,11 @@ export default class App extends Component {
       bccRecipients: ['[email protected]'],
       body: '<b>A Bold Body</b>',
       isHTML: true,
-      attachments: {[
+      attachments: [{
         path: '',  // The absolute path of the file from which to read data.
         type: '',   // Mime Type: jpg, png, doc, ppt, html, pdf
         name: '',   // Optional: Custom filename for attachment
-      ]}
+      }]
     }, (error, event) => {
       Alert.alert(
         error,