[Debian-med-packaging] Bug#959597: python-schema-salad FTBFS: python-rdflib-jsonld too new

[Rebecca N. Palmer]

Control: retitle -1 schema-salad FTBFS: python-rdflib-jsonld too new
Control: tags -1 fixed-upstream patch

This explicit version check was relaxed (without other changes) in the 
next upstream commit, though I haven't tested this change:

https://github.com/common-workflow-language/schema_salad/commit/d563b93939446ec0f29088e393db5fc6458b6c88