Merge pull request #376 from Boyquotes/master

a comma is missing from the license table

src/constants.php

@@ -101,7 +101,7 @@ return $constants = [
         'BSL-1.0' => 'Boost Software License',
         'ISC' => 'ISC License',
         'Unlicense' => 'The Unlicense License',
-        'Zlib' => 'zlib License'
+        'Zlib' => 'zlib License',
         'Proprietary' => 'Proprietary (see LICENSE file)',
     ]
 ];