Update copyright

michaelcullum · web-flow · commit cc3216dd7453 · 2016-09-09T00:46:37.000+01:00
diff --git a/LICENSE b/LICENSE
@@ -1,6 +1,7 @@
 The MIT License (MIT)
 
-Copyright (c) 2013 container-interop
+Copyright (c) 2013-2016 container-interop
+Copyright (c) 2016 PHP Framework Interoperability Group
 
 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
