Introduced dependency relations for MATE

Change-Id: Ic78e9711612b9dcb73af21d8e60e02bdf8427113
diff --git a/Makefile.PL b/Makefile.PL
index 5034c5f..972d207 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -9,6 +9,7 @@
   AUTHOR       => 'Nils Diewald',
   ABSTRACT     => 'Preprocess KorAP XML documents for Krill',
   VERSION_FROM => 'lib/KorAP/XML/Krill.pm',
+  LICENSE      => 'bsd_2',
   PREREQ_PM => {
     'Mojolicious'    => 6.11,
     'Packed::Array'  => 0.01,