Add when "mingw" then "windows" case

[ariccio]

Making this change locally allowed me to run lefthook. I do not know if there are any kind of ABI issues, I have no actual idea how lefthook works, but I suspect it's fine since it looks like there's no actual interface between go and ruby, only at the process level?

Fixes #296

[mrexox]

Hey! Thank you very much for the fix!

[ariccio]

Heh, of all the weird environment issues I've faced the past few months, this was one of the only ones that was easy to figure out and fix!

Among them:

1. Expo failing to connect to my laptop because for some reason only two devices on my local network have bad ARP tables, those two are my android dev device and my laptop, and the only thing missing from the table was precisely the two devices I wanted to talk to eachother... The only way I fixed that was nmaping the network, which apparently caused someone to update.
2. Windows deciding to reserve ports in ways that other platforms seemingly don't, which leads to all kinds of confusion.
3. libuv in node not handling errors in a generic way, so uncommon OS errors (like subtle disk corruption) cause hard-to-debug crashes. That one took a while.

[mrexox]

Hey! I have released your fix with v1.0.5. Please, come back if you have any problem!