Is timeout option implemented?

It could just be that I'm not understanding how to use options, but I also do not see timeouts implemented in the source.

Should this request timeout after 5 seconds? I have tried this and I do not get a timeout with version 0.5.0.

``` javascript
unirest
.post(`http://localhost/api`)
.headers(
{ 'x-test': "true",
'x-test-data': "55" }
)
.attach({
'file': './path/file.jpg'
})
.timeout(5000)
.end((response) => {

if (!response.ok) {
throw new Error('failed to upload file')
}
})
```

Start by reproducing the JavaScript example against the local upload endpoint and then trace how the .timeout(5000) option is handled. Check whether the request aborts after five seconds; done means the behavior matches the documented timeout semantics, with a focused test or documentation update if the option is unsupported.

Written by the indexing model from the issue text.