fix glib prefix on windows

[boussaffawalid]

We are using glib from conan https://conan.io/center/recipes/glib?version=2.85.3
and dlls are named glib-2.0-0.dll instead of libglib-2.0-0.dll

Added this change to support both cases

[jcupitt]

Hi @boussaffawalid, thanks for this.

Oh dear :( Does Conan remove the lib prefix from libvips.dll as well? Or is this a strange special case?

You probably saw, you can install pyvips with pip install "pyvips[binary]" and you don't need Conan. Perhaps you still need it for other packages.

[jcupitt]

I added a note to the CHANGELOG and credited you, I hope that's OK.

[boussaffawalid]

@jcupitt this only happens with glib. it should work for both cases now! Really appreciate the quick reply!