Drop no longer required python-pyrsistent runtime dependency.
Add new python-jsonschema-specifications runtime dependency.
Add new python-referencing runtime dependency.
Add new python-rpds-py runtime dependency.
Propagate python-rpds-py target rust support requirement to
python-jsonschema reverse dependencies.
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>