deps(update): twitter_cldr update to > 3.2

Changelog is
[there](https://github.com/twitter/twitter-cldr-rb/blob/master/History.txt)

gollum.gemspec

@@ -33,7 +33,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rack-test', '~> 0.6.2'
   s.add_development_dependency 'shoulda', '~> 3.5.0'
   s.add_development_dependency 'minitest-reporters', '~> 0.14.16'
-  s.add_development_dependency 'twitter_cldr', '~> 2.4.2'
+  s.add_development_dependency 'twitter_cldr', '~> 3.2.0'
   s.add_development_dependency 'mocha', '~> 1.1.0'
 
   # = MANIFEST =

test/test_app.rb

@@ -64,7 +64,7 @@ context "Frontend" do
   end
 
   def nfd utf8
-    TwitterCldr::Normalization::NFD.normalize utf8
+    TwitterCldr::Normalization.normalize(utf8, using: :nfd)
   end
 
   test "UTF-8 headers href preserved" do