Update site for 4.x release

.gitignore

@@ -1,3 +1,4 @@
 _site
 .sass-cache
 .jekyll-metadata
+/.jekyll-cache/

Gemfile

@@ -0,0 +1,7 @@
+source 'https://rubygems.org' do
+  gem 'jekyll'
+
+  group :jekyll_plugins do
+    gem 'jekyll-commonmark-ghpages'
+  end
+end

Gemfile.lock

@@ -0,0 +1,79 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    colorator (1.1.0)
+    commonmarker (0.17.13)
+      ruby-enum (~> 0.5)
+    concurrent-ruby (1.1.6)
+    em-websocket (0.5.1)
+      eventmachine (>= 0.12.9)
+      http_parser.rb (~> 0.6.0)
+    eventmachine (1.2.7)
+    ffi (1.13.1)
+    forwardable-extended (2.6.0)
+    http_parser.rb (0.6.0)
+    i18n (1.8.4)
+      concurrent-ruby (~> 1.0)
+    jekyll (4.1.1)
+      addressable (~> 2.4)
+      colorator (~> 1.0)
+      em-websocket (~> 0.5)
+      i18n (~> 1.0)
+      jekyll-sass-converter (~> 2.0)
+      jekyll-watch (~> 2.0)
+      kramdown (~> 2.1)
+      kramdown-parser-gfm (~> 1.0)
+      liquid (~> 4.0)
+      mercenary (~> 0.4.0)
+      pathutil (~> 0.9)
+      rouge (~> 3.0)
+      safe_yaml (~> 1.0)
+      terminal-table (~> 1.8)
+    jekyll-commonmark (1.3.1)
+      commonmarker (~> 0.14)
+      jekyll (>= 3.7, < 5.0)
+    jekyll-commonmark-ghpages (0.1.6)
+      commonmarker (~> 0.17.6)
+      jekyll-commonmark (~> 1.2)
+      rouge (>= 2.0, < 4.0)
+    jekyll-sass-converter (2.1.0)
+      sassc (> 2.0.1, < 3.0)
+    jekyll-watch (2.2.1)
+      listen (~> 3.0)
+    kramdown (2.3.0)
+      rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
+    liquid (4.0.3)
+    listen (3.2.1)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    mercenary (0.4.0)
+    pathutil (0.16.2)
+      forwardable-extended (~> 2.6)
+    public_suffix (4.0.5)
+    rb-fsevent (0.10.4)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
+    rexml (3.2.4)
+    rouge (3.21.0)
+    ruby-enum (0.8.0)
+      i18n
+    safe_yaml (1.0.5)
+    sassc (2.4.0)
+      ffi (~> 1.9)
+    terminal-table (1.8.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
+    unicode-display_width (1.7.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  jekyll!
+  jekyll-commonmark-ghpages!
+
+BUNDLED WITH
+   2.1.4

LICENSE.txt

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2016-2018 Evan Hahn
+Copyright (c) 2016-2020 Evan Hahn
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

_config.yml

@@ -9,9 +9,9 @@
 title: Helmet
 short_description: Express.js security with HTTP headers
 description: Helmet helps you secure your Express.js apps by setting various HTTP headers. It's not a silver bullet, but it can help!
-helmet_version: "3.23.0"
+helmet_version: "4.0.0"
 baseurl: ""
 url: "https://helmetjs.github.io" # the base hostname & protocol for your site
 
 # Build settings
-markdown: kramdown
+markdown: CommonMarkGhPages