add get_capabilities_ex

[Lokathor]

Since we already also have GetStateEx, this closes #16

[Lokathor]

@MaulingMonkey , @djeedai

[djeedai]

Thanks @Lokathor! Trying to test but all fields are private, so I'm not sure what's the usage pattern for XINPUT_CAPABILITIES_EX?

[djeedai]

Other than that, this seems to work:

use rusty_xinput::XInputHandle;

fn main() {
    let handle = XInputHandle::load_default().unwrap();
    let caps_ex = handle.get_capabilities_ex(0).unwrap();
    println!(
        "caps_ex: {:X?} {:X?} {:?} {:?}",
        caps_ex.vendor_id, caps_ex.product_id, caps_ex.revision_id, caps_ex.a4
    );

caps_ex: 45E 2E0 0 0

45E: Microsoft Corp.
2E0: Xbox One Wireless Controller

https://devicehunt.com/view/type/usb/vendor/045E/device/02E0

[Lokathor]

all fields are private

Good point, definitely didn't want to forget about that part.

[Lokathor]

released in 1.3.0

[djeedai]

Thanks a lot @Lokathor !