Bumping to more recent version of lua-resty-http?

Kong is using a relatively old version of lua-resty-http: version 0.08, dated May 2016.
Would it be possible to bump to the latest available version (v0.12, dated Dec 2017) as it provides some interesting features that might then be available to Kong plugins developers (timeouts management, forward proxy, removal of hyphenization)?

Sure! Would you mind sending a PR? Thanks!

PR submitted today !

Merge, thanks!