Update LICENSE

LICENSE

-MIT License
+Various.
 
-Copyright (c) 2018 Chris Jones
+Note that files in the repository have various licenses.
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+Some files originate from the Apple Open Source repository, and are subject to the 
+Apple Public Open Source License Version 2.0. Other files may have other
+licenses as per each source file.
+
+Parts of this project that have been created by members of the MacPorts community 
+are under the MIT License
+
+Copyright (c) 2018-2020 Chris Jones, Ken Cunningham, Michael Dickens, 
+Mihai Moldovan, and many other contributing members of the MacPorts community
 
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.