Upgrade jackson to 2.9.6
Upgrade jackson to 2.9.6

Signed-off-by: Andreas Schwarte <e77d70c35db7acb5c1ca19e621121dcbb9bab6a2@gmail.com>
eclipse/rdf4j,eclipse/rdf4j,eclipse/rdf4j,eclipse/rdf4j,eclipse/rdf4j,eclipse/rdf4j