Enable processthreadsapi feature for winapi crate

[stv0g]

As required by src/utils.rs:91

[CLAassistant]

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[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[stv0g]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

Sorry, my employer does not allow me to sign a CLA.

[korniltsev]

Sorry to hear that. Let's close the PR. Feel free to reopen.