[MAINTENANCE] Prepare Release 5.1.0

Revert "[BUGFIX] Fix for `$documentArray` being `null` after function…

… `getDocumentById` is called (kitodo#1345)"

This reverts commit fdc2975.

[RELEASE] Release v5.0.5

[MAINTENANCE] Update dependencies and version

[RELEASE] Kitodo.Presentation 5.0.3

[RELEASE] Kitodo.Presentation 5.0.2

[RELEASE] Kitodo.Presentation 5.0.1 (kitodo#1242)

Prepare Release 5.0 (kitodo#1210)

[MAINTENANCE] Minor improvements in test classes (kitodo#1159)

Co-authored-by: Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>

[MAINTENANCE] Improvements in BaseCommand class (kitodo#1130)

Co-authored-by: Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>