Log Message:
Update ruby-em-http-request to 1.1.3.

Quote from commit logs:

* Reset and close connection on duplicate response.
* Rescue from StandardError instead of Exception.
* Handle redirects on keep-alive connections.
* Fix the issue when redirect url is triggered only after inactivity timeout.
* ignore query option when redirecting.
* Use Base64.strict_encode64 to not add line feeds.
* Cleanup header annotations for rubydocs, closes #281.
* Use inferred_port, port can be nil causing connection failures.
* Don't modify header for CONNECT style proxies.
* fixing specs, cleaning up deprecation warning.
* Don't memoize status; http_status may change.