Update Express documentation (4.16.1)

Author: Thibaut

lib/docs/filters/express/clean_html.rb

@@ -15,7 +15,10 @@ def call
 
         @doc = at_css('#page-doc') unless root_page?
 
-        at_css('h1').remove if root_page?
+        if root_page?
+          at_css('h1').remove
+          css('> header', '#menu').remove
+        end
 
         # Put id attributes on headings
         css('h2 + a[name]').each do |node|

lib/docs/scrapers/express.rb

@@ -2,7 +2,7 @@ module Docs
   class Express < UrlScraper
     self.name = 'Express'
     self.type = 'express'
-    self.release = '4.15.4'
+    self.release = '4.16.1'
     self.base_url = 'http://expressjs.com/en/'
     self.root_path = '4x/api.html'
     self.initial_paths = %w(