Upgrade to libvips v8.13.0-rc1 (#3230)

* Switch from decompress-zip to extract-zip

The former seems to hang when unzipping a ZIP64 file that uses
the general purpose bit flag 3 as file entry.

See: https://github.com/thejoshwolfe/yauzl#no-streaming-unzip-api

* Prefer to call via static member instead

Makes it clearer that a static method is being called.

* `flatten-orange.jpg`: save without chroma subsampling

To ensure no down-scaling of the Cr/Cb channels.

test/unit/util.js

@@ -140,7 +140,6 @@ describe('Utilities', function () {
       assert.strictEqual('object', typeof sharp.vendor);
       assert.strictEqual('string', typeof sharp.vendor.current);
       assert.strictEqual(true, Array.isArray(sharp.vendor.installed));
-      assert.strictEqual(true, sharp.vendor.installed.length > 0);
     });
   });
 });