Adds support for PDF extensions including ISO 32001.
Features
- Integrated 'Arlington' PDF data model as a validation step.
- Added support for PDF extensions, specifically ISO 32001 (which adds the SHA-3 family of signature hashes) and ISO 32002 (which adds Edwards Curves Ed25519 and Ed448, both of which were added in Java 15).
- Added 'AnnotationFile.setCustomAppearance()' to support custom visualizations for file annotations.
- You no longer need to update or generate ProcSets, which have been obsolete since 2001.