Update devDependencies and gems

Gemfile

@@ -1,9 +1,9 @@
 source 'https://rubygems.org'
 
-gem 'jekyll', '~> 4.0.0'
+gem 'jekyll', '~> 4.1.1'
 gem 'jekyll-avatar', '~> 0.7.0'
-gem 'jekyll-email-protect', '~> 1.0.3'
-gem 'jekyll-feed', '~> 0.13.0'
+gem 'jekyll-email-protect', '1.0.3'
+gem 'jekyll-feed', '~> 0.15.0'
 gem 'jekyll-paginate', '~> 1.1.0'
 gem 'jekyll-redirect-from', '~> 0.16.0'
 gem 'jekyll-sitemap', '~> 1.4.0'

Gemfile.lock

@@ -4,80 +4,83 @@ GEM
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.7)
     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)
-    ffi (1.12.2)
-    ffi (1.12.2-x64-mingw32)
+    ffi (1.13.1)
+    ffi (1.13.1-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
-    i18n (1.8.2)
+    i18n (1.8.5)
       concurrent-ruby (~> 1.0)
-    jekyll (4.0.0)
+    jekyll (4.1.1)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
-      i18n (>= 0.9.5, < 2)
+      i18n (~> 1.0)
       jekyll-sass-converter (~> 2.0)
       jekyll-watch (~> 2.0)
       kramdown (~> 2.1)
       kramdown-parser-gfm (~> 1.0)
       liquid (~> 4.0)
-      mercenary (~> 0.3.3)
+      mercenary (~> 0.4.0)
       pathutil (~> 0.9)
       rouge (~> 3.0)
       safe_yaml (~> 1.0)
       terminal-table (~> 1.8)
     jekyll-avatar (0.7.0)
       jekyll (>= 3.0, < 5.0)
     jekyll-email-protect (1.0.3)
-    jekyll-feed (0.13.0)
+    jekyll-feed (0.15.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-paginate (1.1.0)
     jekyll-redirect-from (0.16.0)
-    jekyll-sass-converter (2.0.1)
+      jekyll (>= 3.3, < 5.0)
+    jekyll-sass-converter (2.1.0)
       sassc (> 2.0.1, < 3.0)
     jekyll-sitemap (1.4.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.1.0)
+    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 (0.3.6)
+    mercenary (0.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.3)
-    rb-fsevent (0.10.3)
+    public_suffix (4.0.6)
+    rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rouge (3.15.0)
+    rexml (3.2.4)
+    rouge (3.23.0)
     safe_yaml (1.0.5)
-    sassc (2.2.1)
+    sassc (2.4.0)
       ffi (~> 1.9)
-    sassc (2.2.1-x64-mingw32)
+    sassc (2.4.0-x64-mingw32)
       ffi (~> 1.9)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    unicode-display_width (1.6.1)
+    unicode-display_width (1.7.0)
     wdm (0.1.1)
 
 PLATFORMS
   ruby
   x64-mingw32
 
 DEPENDENCIES
-  jekyll (~> 4.0.0)
+  jekyll (~> 4.1.1)
   jekyll-avatar (~> 0.7.0)
-  jekyll-email-protect (~> 1.0.3)
-  jekyll-feed (~> 0.13.0)
+  jekyll-email-protect (= 1.0.3)
+  jekyll-feed (~> 0.15.0)
   jekyll-paginate (~> 1.1.0)
   jekyll-redirect-from (~> 0.16.0)
   jekyll-sitemap (~> 1.4.0)