Eexception 'collection'

[as2x2is4]

Basic SRTM test sample Failed
python stac-simple.py --extension=".tif" --default-date="2020-06-30T12:00Z" --platform=srtm --band-name=elevation --band-type=int16 --band-nodata=-32768.0 --create-product --no-cog-convert examples/srtm

Failed to process ###.tif with exception 'collection'

The NEW "collection" tag should be present in stac_dict / create_stac(raster, platform, band_name, default_date)
Failed in stac_transform(stac_dict) / json.dump(stac_transform(stac_dict), f, indent=2)