Results 2 issues of Luke Zeitlin

**Describe the bug** Not able to correctly display bands above the first 4 with multiple geotiffs in a single geotiffsource I have geotiffs with 11 bands and a nodata value...

bug

When running geotiff with webpack bundling I get a chunkLoadError from the promise that attempts to load decoder.js https://github.com/geotiffjs/geotiff.js/blob/master/src/pool.js#L48-L51