Describe the bug
The library does not build under Windows.

error[E0432]: unresolved import windows
--> %userprofile%.cargo\registry\src\github.com-1ecc6299db9ec823\libzmq-sys-0.1.7+4.3.2\src\errno.rs:6:5
|
6 | use windows::errno;
| ^^^^^^^ use of undeclared type or module windows

To Reproduce
Add dependency to libzmq to cargo.toml and run cargo build on a Windows machine.

Platform:

• OS: Win 10
• API Version 0.2.1