Dutch: @book volume is wrongly italicized

Description According to the Tilburg University Dutch localisation of APA7, the volume for @books should be printed in parentheses, not italicized, directly after the title. Here are some examples, one of which has been made into the example below.

MWE

\documentclass{report}

\usepackage[dutch]{babel}
\usepackage[style=apa, backend=biber]{biblatex}

\begin{filecontents}[overwrite]{test.bib}
@book{Churchill1956,
    author = {Churchill, W. S.},
    date = {1956},
    maintitle = {The birth of Britain},
    volume = {1},
    title = {A history of the {E}nglish-speaking peoples},
    publisher = {Dodd, Mead \& Company},
}
\end{filecontents}
\addbibresource{test.bib}

\begin{document}
\nocite{*}
\printbibliography
\end{document}

Observed output Churchill, W. S. (1956). The birth of Britain. Deel 1. A history of the English-speaking peoples. Dodd, Mead & Company.

Expected output Churchill, W. S. (1956). The birth of Britain (Deel 1). A history of the English-speaking peoples. Dodd, Mead & Company.

Note that there no longer is a period / full stop between the maintitle and the volume information.

plk / biblatex-apa

Dutch: @book volume is wrongly italicized #222