Exception when querying the STAC catalog

[ots22]

See alan-turing-institute/scivision#578

Searching the resulting query (line below) results in an exception being raised, "pystac_client.warnings.DoesNotConformTo: Server does not conform to ITEM_SEARCH, There is not fallback option available for search."

scivision_sentinel2_stac/scivision_sentinel2_stac/data.py

Line 72 in 59745cd

query = catalog.search(

There is a v1 API (see https://www.element84.com/earth-search/examples/) - is using that enough to fix it?