Updating to MultiJson's new load API

[zmoazeni]

MultiJson is deprecating the decode/encode methods in favor of load/dump as of https://github.com/intridea/multi_json/tree/e90fd6cb1b0293eb0c73c2f4eb0f7a1764370216 which was pushed out in v1.3.0.

This pull request updates the API to call MultiJson.load to get rid of the deprecated messages and updates the gemspec to depend on >= 1.3.0 so nothing weird happens with mismatched versions.

[zmoazeni]

The >= 1.3.0 may be too lax considering Rails v3.2 is locking down to ~> 1.3 in rails/rails@625f4b9#activesupport/activesupport.gemspec

Edit

Bleh, I was looking at the wrong commit. v3.2 does have it locked down to < 1.3 in https://github.com/rails/rails/blob/3-2-stable/activesupport/activesupport.gemspec

[javierg]

+1

[zmoazeni]

I'm keeping an eye on rails/rails#5896 - if that gets merged in, we will be alright sticking with >= 1.3

[zmoazeni]

Looks like rails merged in a fix that allows >= 1.3 rails/rails#5896 (comment)

v1.3.0 is where load/unload were added to MultiJson

Edit: Actually it's ~> 1.0, perhaps tweaking it to ~> 1.3 would be better than >= 1.3 in this context