Switch license to LGPLv3 or later

README.md

@@ -125,9 +125,10 @@ All code and data is licensed under version 3.0 (and only version 3.0) of the
 
 Copyright (c) 2019-2020 OpenRS2 Authors
 
-OpenRS2 Natives is free software: you can redistribute it and/or modify it under
-the terms of version 3.0 of the GNU Lesser General Public License as published
-by the Free Software Foundation.
+OpenRS2 Natives is free software: you can redistribute it and/or modify it
+under the terms of the GNU Lesser General Public License as published by the
+Free Software Foundation, either version 3 of the License, or (at your option)
+any later version.
 
 OpenRS2 Natives is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

pom.xml

@@ -19,7 +19,7 @@
   </description>
   <licenses>
     <license>
-      <name>GNU Lesser General Public License v3.0</name>
+      <name>GNU Lesser General Public License v3.0 or later</name>
       <url>https://www.gnu.org/licenses/lgpl-3.0.txt</url>
     </license>
   </licenses>