configure_extension doesn't handle packages with version specified

[Youw]

When using libs or cflags functions like:

pkgconfig.cflags('libusb-1.0 >= 1.0.9')

The package with version is handled correctly.

But if I try to use it with configure_extension:

pkgconfig.configure_extension(hid, 'libusb-1.0 >= 1.0.9')

due to split being used to handle multiple packages - it is incorrectly being threated as 3 different packages: libusb-1.0, >= and 1.0.9. (Naturally if fails to find the >= package).

Avoiding spaces is not an option as it is an invalid pkg-config syntax.

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The ultimate fix would be to use list of strings as an argument, instead of a single string, where each element of a list is a single package to be an argument to pkg-config (to be quoted with ' before passing to pkg-config commend), but that would break API/backward-compatibility.

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My workaround is to re-implement my own copy of configure_extension.
Don't see a feasible workaround for now, as pkgconfig doesn't allow passing extra options, like --msvc-syntax (#38).
Probably just going to lose the version information, which is unfortunate.
Had make my own implementation instead of using pkgconfig package to preserve the version requirement.