Update copyright dates; move to GPLv3

Author: asmecher

HypothesisPlugin.inc.php

@@ -1,15 +1,13 @@
 <?php
 
 /**
- * @file plugins/generic/hypothesis/HypothesisPlugin.inc.php
+ * @file HypothesisPlugin.inc.php
  *
- * Copyright (c) 2013-2019 Simon Fraser University
- * Copyright (c) 2003-2019 John Willinsky
- * Distributed under the GNU GPL v2. For full terms see the file docs/COPYING.
+ * Copyright (c) 2013-2020 Simon Fraser University
+ * Copyright (c) 2003-2020 John Willinsky
+ * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
  *
  * @class HypothesisPlugin
- * @ingroup plugins_generic_hypothesis
- *
  * @brief Hypothesis annotation/discussion integration
  */