Other output formats in readme

README.md

@@ -22,9 +22,17 @@ use Mpdf\QrCode\Output;
 
 $qrCode = new QrCode('Lorem ipsum sit dolor');
 
+// Save black on white PNG image 100 px wide to filename.png. Colors are RGB arrays.
 $output = new Output\Png();
-
-// Save black on white PNG image 100px wide to filename.png
 $data = $output->output($qrCode, 100, [255, 255, 255], [0, 0, 0]);
 file_put_contents('filename.png', $data);
+
+// Echo a SVG file, 100 px wide, black on white.
+// Colors can be specified in SVG-compatible formats
+$output = new Output\Svg();
+echo $output->output($qrCode, 100, 'white', 'black');
+
+// Echo an HTML table
+$output = new Output\Html();
+echo $output->output($qrCode);
 ```