feat(curl): add option to disallow redirections

[arielherself]

While developing plugins using plenary.nvim, I notice that it calls curl with option -L by default. However, the website I am working with uses status code 302 to mark the login successful, which leads to an infinite redirection in my plugin. I think it would be good to add support for disabling following redirection, so I add a new option redirect which is true by default.