Address DeparecationWarning for rdflib-jsonld

[tramyn]

I am getting this DeprecationWarning when running Intent Parser.

python3.8/site-packages/rdflib_jsonld/__init__.py:9: DeprecationWarning: The rdflib-jsonld package has been integrated into rdflib as of rdflib==6.0.0.  Please remove rdflib-jsonld from your project's dependencies.
  warnings.warn(

I can see that this deprecation warning is linked to opil. This can be reproduced if you create an virtual environment and specify the following command in python3 :

from opil import *

I am using opil==1.0b5.post2.

Please address this warning in the opil library configuration because this message is making its way up to applications using this library.