Add gotOpts

[duncanfwalker]

I see that since the proxy request was closed ( #22) proxy support has been added to got.

I would like to be able to pass options through to got so that I can use a tunneling agent over a proxy.

Would you consider a pull request to add this in? If you are I'd be happy to have a go.

[duncanfwalker]

Hi @sindresorhus - do you think you would be open to a PR for adding those options in? I know it isn't priority for a lot of people but I imagine there are a few people trying to use this in corporate environments

[sindresorhus]

Probably not, sorry. My stance is that this should be solved in Node.js, or at the very least in Got (without any options needed). I'm not interested in having options for this in every module that does any kind of HTTP. If I allow this, I'm gonna get requests for this kind of option in every module that depends on package-json, etc etc.