Update json due to install problems on 2.3.0

Author: PragTob

Gemfile.lock

@@ -40,7 +40,7 @@ GEM
       uber (~> 0.0.4)
     http_parser.rb (0.5.3)
     i18n (0.6.11)
-    json (1.8.1)
+    json (1.8.3)
     kramdown (1.4.1)
     listen (2.7.9)
       celluloid (>= 0.15.2)
@@ -133,3 +133,6 @@ DEPENDENCIES
   middleman-deploy
   middleman-livereload
   wdm (~> 0.1.0)
+
+BUNDLED WITH
+   1.11.2