cannot serialize to jsonld as of 3.31.4 ; rdflib_jsonld 0.6.2 is an empty shell
As of 3.31.4 a dependency to rdflib-jsonld >= 0.6.2 has been set, waiting for rdflib >= 6.0.0 to be integrated into cubicweb. But this version of rdflib-jsonld is an empty shell, an provide nothing at all: cf https://github.com/RDFLib/rdflib-jsonld/commit/02e447be4d62a14029181b34ecb354ac3c9e6697
We should fix rdflib-jsonld to a lower version waiting for rdflib >= 6.0.0 to be integrated, and re-do all the releases (on 3.31, 3.32, 3.33 and default…)