pdfcpu info does not show author attribute

[Andreas Erhard]

pdfcpu info does not show author attribute

Please ensure the following:

• Your issue is based on the latest commit

pdfcpu: v0.7.0 dev
commit: f783bf23 (2024-04-15T12:17:46Z)
base  : go1.22.1

• State your OS and OS version

Debian 11, Debian 12

The info command lacks the author information, it is apparently always empty regardless of the actual PDF content.

PR to follow soon...