copyright again

h2/src/main/org/h2/mvstore/tx/VersionedValueType.java

 /*
- * Copyright 2004-2017 H2 Group. Multiple-Licensed under the MPL 2.0,
+ * Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0,
  * and the EPL 1.0 (http://h2database.com/html/license.html).
  * Initial Developer: H2 Group
  */