Updated to avoid deprecation of encode and decode methods in multi_json gem.

tasks/gem.rake

@@ -28,7 +28,7 @@ namespace :gem do
     s.add_runtime_dependency('addressable', '>= 2.2.3')
     s.add_runtime_dependency('autoparse', '>= 0.3.1')
     s.add_runtime_dependency('faraday', '~> 0.7.0')
-    s.add_runtime_dependency('multi_json', '>= 1.0.0')
+    s.add_runtime_dependency('multi_json', '>= 1.3.0')
     s.add_runtime_dependency('extlib', '>= 0.9.15')
 
     # Dependencies used in the CLI