ref: 34238e0feb181a0c120561486d4c86b054d112bc
parent: 3c27f041321b91dbf2bfd0ab9e4865e03854cd68
author: Sigrid Haflínudóttir <ftrvxmtrx@gmail.com>
date: Fri Aug 28 14:02:18 EDT 2020
fix xref parsing and add pdfeval to resolve indirect objects