Bump to version 1.4.0

Author: n-rodriguez

lib/ajax-datatables-rails/version.rb

@@ -8,8 +8,8 @@ def self.gem_version
 
   module VERSION
     MAJOR = 1
-    MINOR = 3
-    TINY  = 1
+    MINOR = 4
+    TINY  = 0
     PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')