Bump minimal-mistakes-jekyll from 4.20.2 to 4.22.0

Bumps [minimal-mistakes-jekyll](https://github.com/mmistakes/minimal-mistakes) from 4.20.2 to 4.22.0.
- [Release notes](https://github.com/mmistakes/minimal-mistakes/releases)
- [Changelog](https://github.com/mmistakes/minimal-mistakes/blob/master/CHANGELOG.md)
- [Commits](mmistakes/minimal-mistakes@4.20.2...4.22.0)

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

Gemfile.lock

@@ -5,20 +5,25 @@ GEM
       public_suffix (>= 2.0.2, < 5.0)
     asciidoctor (2.0.10)
     colorator (1.1.0)
-    concurrent-ruby (1.1.7)
-    em-websocket (0.5.1)
+    concurrent-ruby (1.1.8)
+    em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
+    eventmachine (1.2.7)
     eventmachine (1.2.7-java)
     eventmachine (1.2.7-x64-mingw32)
-    faraday (1.0.1)
+    faraday (1.3.0)
+      faraday-net_http (~> 1.0)
       multipart-post (>= 1.2, < 3)
-    ffi (1.13.1-java)
-    ffi (1.13.1-x64-mingw32)
+      ruby2_keywords
+    faraday-net_http (1.0.1)
+    ffi (1.15.0)
+    ffi (1.15.0-java)
+    ffi (1.15.0-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
     http_parser.rb (0.6.0-java)
-    i18n (1.8.5)
+    i18n (1.8.9)
       concurrent-ruby (~> 1.0)
     jekyll (4.1.1)
       addressable (~> 2.4)
@@ -42,7 +47,7 @@ GEM
       jekyll (>= 3.7, < 5.0)
     jekyll-gist (1.5.0)
       octokit (~> 4.2)
-    jekyll-include-cache (0.2.0)
+    jekyll-include-cache (0.2.1)
       jekyll (>= 3.7, < 5.0)
     jekyll-paginate (1.1.0)
     jekyll-sass-converter (2.1.0)
@@ -56,19 +61,19 @@ GEM
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
-    listen (3.2.1)
+    listen (3.4.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
-    minimal-mistakes-jekyll (4.20.2)
+    minimal-mistakes-jekyll (4.22.0)
       jekyll (>= 3.7, < 5.0)
       jekyll-feed (~> 0.1)
       jekyll-gist (~> 1.5)
       jekyll-include-cache (~> 0.1)
       jekyll-paginate (~> 1.1)
       jekyll-sitemap (~> 1.3)
     multipart-post (2.1.1)
-    octokit (4.18.0)
+    octokit (4.20.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.2)
@@ -78,7 +83,8 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.4)
-    rouge (3.23.0)
+    rouge (3.26.0)
+    ruby2_keywords (0.0.4)
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
@@ -99,6 +105,7 @@ GEM
 
 PLATFORMS
   java
+  ruby
   x64-mingw32
 
 DEPENDENCIES