Update footer copyright to 2019 (#30872).

git-svn-id: https://svn.redmine.org/redmine/trunk@17952 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/layouts/base.html.erb

@@ -118,7 +118,7 @@
 <div id="ajax-modal" style="display:none;"></div>
 
 <div id="footer">
-    Powered by <%= link_to Redmine::Info.app_name, Redmine::Info.url %> &copy; 2006-2018 Jean-Philippe Lang
+    Powered by <%= link_to Redmine::Info.app_name, Redmine::Info.url %> &copy; 2006-2019 Jean-Philippe Lang
 </div>
 </div>
 </div>