Expose TIFF compression and predictor options (#738)

test/fixtures/index.js

@@ -84,6 +84,7 @@ module.exports = {
   inputWebPWithTransparency: getPath('5_webp_a.webp'), // http://www.gstatic.com/webp/gallery3/5_webp_a.webp
   inputTiff: getPath('G31D.TIF'), // http://www.fileformat.info/format/tiff/sample/e6c9a6e5253348f4aef6d17b534360ab/index.htm
   inputTiffCielab: getPath('cielab-dagams.tiff'), // https://github.com/lovell/sharp/issues/646
+  inputTiffUncompressed: getPath('uncompressed_tiff.tiff'), // https://code.google.com/archive/p/imagetestsuite/wikis/TIFFTestSuite.wiki file: 0c84d07e1b22b76f24cccc70d8788e4a.tif
   inputGif: getPath('Crash_test.gif'), // http://upload.wikimedia.org/wikipedia/commons/e/e3/Crash_test.gif
   inputGifGreyPlusAlpha: getPath('grey-plus-alpha.gif'), // http://i.imgur.com/gZ5jlmE.gif
   inputSvg: getPath('check.svg'), // http://dev.w3.org/SVG/tools/svgweb/samples/svg-files/check.svg
@@ -102,6 +103,7 @@ module.exports = {
   outputPng: getPath('output.png'),
   outputWebP: getPath('output.webp'),
   outputV: getPath('output.v'),
+  outputTiff: getPath('output.tiff'),
   outputZoinks: getPath('output.zoinks'), // an 'unknown' file extension
 
   // Path for tests requiring human inspection