Bump jekyll and rouge

Bumps [jekyll](https://github.com/jekyll/jekyll) and [rouge](https://github.com/rouge-ruby/rouge). These dependencies needed to be updated together.

Updates `jekyll` from 3.9.1 to 4.2.0
- [Release notes](https://github.com/jekyll/jekyll/releases)
- [Changelog](https://github.com/jekyll/jekyll/blob/master/History.markdown)
- [Commits](jekyll/jekyll@v3.9.1...v4.2.0)

Updates `rouge` from 2.2.1 to 3.26.0
- [Release notes](https://github.com/rouge-ruby/rouge/releases)
- [Changelog](https://github.com/rouge-ruby/rouge/blob/master/CHANGELOG.md)
- [Commits](rouge-ruby/rouge@v2.2.1...v3.26.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Gemfile

@@ -3,11 +3,11 @@ source "https://rubygems.org"
 gem 'bourbon', '~> 4.2.1'
 gem 'jekyll-babel', '~>1.1.0'
 gem 'jekyll-paginate', '~>1.1.0'
-gem 'jekyll', '~>3.9.0'
+gem 'jekyll', '~>4.2.0'
 gem 'json', '~> 2.3'
 gem 'neat', '~> 1.7.1'
 gem 'nokogiri', '~> 1.11.0'
-gem 'rouge', '~> 2.2.1'
+gem 'rouge', '~> 3.26.0'
 gem 'therubyracer', '~>0.12.3'
 gem "jekyll-github-metadata", "~> 2.13"
 gem "kramdown", "~> 2.3.1"

Gemfile.lock

@@ -30,29 +30,31 @@ GEM
     ffi (1.15.0)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
-    i18n (0.9.5)
+    i18n (1.8.10)
       concurrent-ruby (~> 1.0)
-    jekyll (3.9.1)
+    jekyll (4.2.0)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
-      i18n (~> 0.7)
-      jekyll-sass-converter (~> 1.0)
+      i18n (~> 1.0)
+      jekyll-sass-converter (~> 2.0)
       jekyll-watch (~> 2.0)
-      kramdown (>= 1.17, < 3)
+      kramdown (~> 2.3)
+      kramdown-parser-gfm (~> 1.0)
       liquid (~> 4.0)
-      mercenary (~> 0.3.3)
+      mercenary (~> 0.4.0)
       pathutil (~> 0.9)
-      rouge (>= 1.7, < 4)
+      rouge (~> 3.0)
       safe_yaml (~> 1.0)
+      terminal-table (~> 2.0)
     jekyll-babel (1.1.0)
       babel-transpiler
     jekyll-github-metadata (2.13.0)
       jekyll (>= 3.4, < 5.0)
       octokit (~> 4.0, != 4.4.0)
     jekyll-paginate (1.1.0)
-    jekyll-sass-converter (1.5.2)
-      sass (~> 3.4)
+    jekyll-sass-converter (2.1.0)
+      sassc (> 2.0.1, < 3.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
     json (2.5.1)
@@ -65,7 +67,7 @@ GEM
     listen (3.5.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    mercenary (0.3.6)
+    mercenary (0.4.0)
     method_source (1.0.0)
     mini_portile2 (2.5.0)
     multipart-post (2.1.1)
@@ -90,29 +92,34 @@ GEM
       ffi (~> 1.0)
     ref (2.0.0)
     rexml (3.2.5)
-    rouge (2.2.1)
+    rouge (3.26.0)
     ruby2_keywords (0.0.4)
     safe_yaml (1.0.5)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
+    sassc (2.4.0)
+      ffi (~> 1.9)
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
     terminal-notifier (2.0.0)
+    terminal-table (2.0.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
     therubyracer (0.12.3)
       libv8 (~> 3.16.14.15)
       ref
     thor (0.20.3)
+    unicode-display_width (1.7.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   bourbon (~> 4.2.1)
-  jekyll (~> 3.9.0)
+  jekyll (~> 4.2.0)
   jekyll-babel (~> 1.1.0)
   jekyll-github-metadata (~> 2.13)
   jekyll-paginate (~> 1.1.0)
@@ -122,7 +129,7 @@ DEPENDENCIES
   neat (~> 1.7.1)
   nokogiri (~> 1.11.0)
   pry
-  rouge (~> 2.2.1)
+  rouge (~> 3.26.0)
   terminal-notifier (~> 2.0.0)
   therubyracer (~> 0.12.3)