Update dependencies and gems.

Gemfile

@@ -1,8 +1,8 @@
 source 'https://rubygems.org'
 
-gem 'jekyll', '~> 3.5.0'
-gem 'jekyll-avatar', '~> 0.4.1'
+gem 'jekyll', '~> 3.7.0'
+gem 'jekyll-avatar', '~> 0.5.0'
 gem 'jekyll-email-protect', '~> 1.0.3'
-gem 'jekyll-feed', '~> 0.9.1'
+gem 'jekyll-feed', '~> 0.9.2'
 gem 'jekyll-paginate', '~> 1.1.0'
 gem 'jekyll-sitemap', '~> 1.1.1'

Gemfile.lock

@@ -4,47 +4,60 @@ GEM
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
     colorator (1.1.0)
+    concurrent-ruby (1.0.5)
+    em-websocket (0.5.1)
+      eventmachine (>= 0.12.9)
+      http_parser.rb (~> 0.6.0)
+    eventmachine (1.2.5)
+    eventmachine (1.2.5-x64-mingw32)
     ffi (1.9.18)
     ffi (1.9.18-x64-mingw32)
     forwardable-extended (2.6.0)
-    jekyll (3.5.2)
+    http_parser.rb (0.6.0)
+    i18n (0.9.1)
+      concurrent-ruby (~> 1.0)
+    jekyll (3.7.0)
       addressable (~> 2.4)
       colorator (~> 1.0)
+      em-websocket (~> 0.5)
+      i18n (~> 0.7)
       jekyll-sass-converter (~> 1.0)
-      jekyll-watch (~> 1.1)
-      kramdown (~> 1.3)
+      jekyll-watch (~> 2.0)
+      kramdown (~> 1.14)
       liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
-      rouge (~> 1.7)
+      rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
-    jekyll-avatar (0.4.2)
+    jekyll-avatar (0.5.0)
       jekyll (~> 3.0)
     jekyll-email-protect (1.0.3)
     jekyll-feed (0.9.2)
       jekyll (~> 3.3)
     jekyll-paginate (1.1.0)
-    jekyll-sass-converter (1.5.0)
+    jekyll-sass-converter (1.5.1)
       sass (~> 3.4)
     jekyll-sitemap (1.1.1)
       jekyll (~> 3.3)
-    jekyll-watch (1.5.0)
-      listen (~> 3.0, < 3.1)
-    kramdown (1.15.0)
+    jekyll-watch (2.0.0)
+      listen (~> 3.0)
+    kramdown (1.16.2)
     liquid (4.0.0)
-    listen (3.0.8)
+    listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
+      ruby_dep (~> 1.2)
     mercenary (0.3.6)
-    pathutil (0.14.0)
+    pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.0)
+    public_suffix (3.0.1)
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    rouge (1.11.1)
+    rouge (3.1.0)
+    ruby_dep (1.5.0)
     safe_yaml (1.0.4)
-    sass (3.5.1)
+    sass (3.5.5)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -55,12 +68,12 @@ PLATFORMS
   x64-mingw32
 
 DEPENDENCIES
-  jekyll (~> 3.5.0)
-  jekyll-avatar (~> 0.4.1)
+  jekyll (~> 3.7.0)
+  jekyll-avatar (~> 0.5.0)
   jekyll-email-protect (~> 1.0.3)
-  jekyll-feed (~> 0.9.1)
+  jekyll-feed (~> 0.9.2)
   jekyll-paginate (~> 1.1.0)
   jekyll-sitemap (~> 1.1.1)
 
 BUNDLED WITH
-   1.15.4
+   1.16.1