Update Gemfile.lock

Author: yamadapc

Gemfile.lock

@@ -1,4 +1,5 @@
 GEM
+  remote: https://rubygems.org/
   specs:
     coderay (1.1.0)
     colorator (0.1)
@@ -42,6 +43,7 @@ GEM
       sass (~> 3.2)
     jekyll-watch (1.3.0)
       listen (~> 3.0)
+    json (1.8.3)
     kramdown (1.9.0)
     liquid (3.0.6)
     listen (3.0.5)
@@ -78,6 +80,4 @@ DEPENDENCIES
   guard-livereload
   jekyll
   jekyll-compose
-
-BUNDLED WITH
-   1.10.6
+  json