TPAC: Death date missing from authors in record details

The trailing period prescribed by ISBD punctuation for x00 $d subfields
in certain circumstances confounds the regex that was expected the $d
subfield to match ^\s*\d{4}-\d{4}\s*$. As a result, death dates were
often being omitted from the record detail display. Relaxing the regex
to match against a trailing .* instead of \s* resolves the issue.

Signed-off-by: Dan Scott <dscott@laurentian.ca>
Signed-off-by: Pasi Kallinen <pasi.kallinen@pttk.fi>
Signed-off-by: Ben Shum <bshum@biblio.org>