ZSTD compressed COGs don't display

[Rdataflow]

Issue
ZSTD compressed COGs don't display.
Instead they log an error to the console.
Error: Unknown compression method identifier: 50000

Context
It seems currently geotiff.js didn't yet implement support for ZSTD compression while i.e. LERC_ZSTD is supported
Will be fixed by geotiffjs/geotiff.js#451

cc @davidoesch @boecklic map.geo.admin.ch may soon display ZSTD compressed COGs 🎉