ports/graphics/libvips: The current version might be possibly old

Hello,

https://cvsweb.openbsd.org/cgi-bin/cvsweb/ports/graphics/libvips/

I found the version of `ports/graphics/libvips` above is 8.9.2, which
was released more than three years ago:
https://github.com/libvips/libvips/releases/tag/v8.9.2

My question is which there is a reason to use the specific version of
that or not.
The latest is 8.14.2. Therefore, I worry it might cause some
dependencies trouble in using it with sharp of Node.js and etc.

Thank you for your precious time. (Well, if I mistook the address to
send or the approach, I would apologize you.)

with great appreciation to the project,
@nabbisen