petrarca.gemspec in petrarca-0.2.0 vs petrarca.gemspec in petrarca-0.3.0

@@ -11,9 +11,11 @@
 
   spec.summary       = %q{Manipulate ISBN numbers.}
   spec.description   = %q{Library to manipulate ISBN numbers for Ruby.}
   spec.homepage      = "https://github.com/takatoh/Petrarca"
 
+  spec.licenses      = ["MIT"]
+
   # Prevent pushing this gem to RubyGems.org. To allow pushes either set the 'allowed_push_host'
   # to allow pushing to a single host or delete this section to allow pushing to any host.
 #  if spec.respond_to?(:metadata)
 #    spec.metadata["allowed_push_host"] = "TODO: Set to 'http://mygemserver.com'"
 #