let jekyll work on ruby 2.2

Author: banjun

Gemfile.lock

@@ -54,7 +54,7 @@ GEM
     rb-inotify (0.9.5)
       ffi (>= 0.5.0)
     redcarpet (3.1.2)
-    safe_yaml (1.0.3)
+    safe_yaml (1.0.4)
     sass (3.4.1)
     timers (1.1.0)
     toml (0.1.1)