Bump xercesImpl in /modello-plugins/modello-plugin-jsonschema
Bump xercesImpl in /modello-plugins/modello-plugin-jsonschema

Bumps xercesImpl from 2.8.1 to 2.12.0.

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
codehaus-plexus/modello