Bump jekyll from 3.8.0 to 3.8.4 (#19)

Bumps [jekyll](https://github.com/jekyll/jekyll) from 3.8.0 to 3.8.4.
- [Release notes](https://github.com/jekyll/jekyll/releases)
- [Changelog](https://github.com/jekyll/jekyll/blob/master/History.markdown)
- [Commits](jekyll/jekyll@v3.8.0...v3.8.4)

Author: dependabot[bot]

Gemfile

@@ -8,7 +8,7 @@ source "https://rubygems.org"
 #
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
-gem "jekyll", "3.8"
+gem "jekyll", "3.8.4"
 
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 gem "minima", "~> 2.0"

Gemfile.lock

@@ -6,17 +6,19 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
+    addressable (2.6.0)
       public_suffix (>= 2.0.2, < 4.0)
     colorator (1.1.0)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.5)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
+    eventmachine (1.2.7)
     eventmachine (1.2.7-x64-mingw32)
     eventmachine (1.2.7-x86-mingw32)
-    ffi (1.9.25-x64-mingw32)
-    ffi (1.9.25-x86-mingw32)
+    ffi (1.11.1)
+    ffi (1.11.1-x64-mingw32)
+    ffi (1.11.1-x86-mingw32)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
     html-pipeline (2.8.4)
@@ -25,7 +27,7 @@ GEM
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.8.0)
+    jekyll (3.8.4)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -45,14 +47,14 @@ GEM
       sass (~> 3.4)
     jekyll-seo-tag (2.5.0)
       jekyll (~> 3.3)
-    jekyll-watch (2.0.0)
+    jekyll-watch (2.2.1)
       listen (~> 3.0)
     jemoji (0.10.0)
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (~> 3.0)
     kramdown (1.17.0)
-    liquid (4.0.0)
+    liquid (4.0.3)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -64,20 +66,22 @@ GEM
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.11.3)
+    nokogiri (1.8.4)
+      mini_portile2 (~> 2.3.0)
     nokogiri (1.8.4-x64-mingw32)
       mini_portile2 (~> 2.3.0)
     nokogiri (1.8.4-x86-mingw32)
       mini_portile2 (~> 2.3.0)
-    pathutil (0.16.1)
+    pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
+    public_suffix (3.0.3)
     rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
-    rouge (3.1.1)
+    rb-inotify (0.10.0)
+      ffi (~> 1.0)
+    rouge (3.3.0)
     ruby_dep (1.5.0)
-    safe_yaml (1.0.4)
-    sass (3.5.7)
+    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)
@@ -89,11 +93,12 @@ GEM
       tzinfo (>= 1.0.0)
 
 PLATFORMS
+  ruby
   x64-mingw32
   x86-mingw32
 
 DEPENDENCIES
-  jekyll (= 3.8)
+  jekyll (= 3.8.4)
   jekyll-feed (~> 0.10.0)
   jekyll-paginate
   jekyll-seo-tag (~> 2.5.0)