torbrowser-pt.rb: upgrade to v4.5, update url and gpg key id

Casks/torbrowser-pt.rb

@@ -1,10 +1,10 @@
 cask :v1 => 'torbrowser-pt' do
-  version '4.0.8'
-  sha256 '3ba7e8daa1fbcbdb0c1d2fbd7a6164a3538bc406aa07a7a5849918ee90be2929'
+  version '4.5'
+  sha256 'f87f6b5bc27b4c47bc05480a056f734ab10a7fe8f515468585712e7cc147d3b8'
 
-  url "https://www.torproject.org/dist/torbrowser/#{version}/TorBrowser-#{version}-osx32_pt-PT.dmg"
+  url "https://dist.torproject.org/torbrowser/#{version}/TorBrowser-#{version}-osx64_pt-PT.dmg"
   gpg "#{url}.asc",
-      :key_id => '4e2c6e8793298290'
+      :key_id => 'ef6e286dda85ea2a4ba7de684e2c6e8793298290'
   homepage 'https://www.torproject.org/projects/torbrowser.html'
   license :oss