Allow any recent version of Requests.
Allow any recent version of Requests.

Travis-CI already has 2.8.x installed, so there's no point downgrading it.

suutari-ai/shoop,shawnadelic/shuup,hrayr-artunyan/shuup,hrayr-artunyan/shuup,suutari-ai/shoop,akx/shoop,shawnadelic/shuup,akx/shoop,shawnadelic/shuup,suutari/shoop,suutari/shoop,taedori81/shoop,shoopio/shoop,suutari-ai/shoop,taedori81/shoop,akx/shoop,shoopio/shoop,suutari/shoop,shoopio/shoop,taedori81/shoop,hrayr-artunyan/shuup