Add input fileSuffix and output alias to format #2642

lib/utility.js

@@ -17,6 +17,10 @@ const sharp = require('./sharp');
  * @returns {Object}
  */
 const format = sharp.format();
+format.heif.output.alias = ['avif', 'heic'];
+format.jpeg.output.alias = ['jpe', 'jpg'];
+format.tiff.output.alias = ['tif'];
+format.jp2k.output.alias = ['j2c', 'j2k', 'jp2', 'jpx'];
 
 /**
  * An Object containing the available interpolators and their proper values