Fallback to regex pub year exraction or empty string in case arrow fails to parse the date

[tZimmermann98]

Fixes #562

Description

When arrow fails to parse the date (due to unexisting date) it raises a ValueError. Catch this Error and fallback to regex year extraction, if no match is found an empty String is stored for pub_year.

Checklist

• Check that the base branch is set to develop and not main.
• Ensure that the documentation will be consistent with the code upon merging.
• Add a line or a few lines that check the new features added.
• Ensure that unit tests pass.
  If you don't have a premium proxy, some of the tests will be skipped.
  The tests that are run should pass without raising
  MaxTriesExceededException or other exceptions.