Update copyright date

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/integration/solr-7.x/branches/release-2.2-branch@1825331 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/NOTICE.txt b/NOTICE.txt
index bb13338..58d919f 100644
--- a/NOTICE.txt
+++ b/NOTICE.txt
@@ -1,5 +1,5 @@
 Apache ManifoldCF Plugin for Apache Solr 7.x
-Copyright 2010-2017 The Apache Software Foundation
+Copyright 2010-2018 The Apache Software Foundation
 
 This product includes software developed by
 The Apache Software Foundation (http://www.apache.org/).