configuration.rb in papers-2.1.0

- old
+ new

@@ -23,10 +23,11 @@
         'Apache-2.0',
         'LGPLv2.1',
         'LGPLv3',
         'Ruby',
         'Manually Reviewed',
-        'Unlicensed'
+        'Unlicensed',
+        'ISC'
       ]
 
       @version_whitelisted_license = nil
 
       @manifest_file = File.join(Dir.pwd, 'config', 'papers_manifest.yml')