fix version number (#19)

Author: urimaro

init.rb

@@ -15,7 +15,7 @@
   name 'Redmine Work Days'
   author 'Agileware Inc.'
   description 'This plugin enables to set the holidays.'
-  version '1.1.0'
+  version '1.2.0'
   author_url 'http://agileware.jp'
 
   menu :admin_menu, :rest_days, { :controller => 'rest_days', :action => 'index' }, :caption => :rest_days