Bump github-pages from 197 to 198

Bumps [github-pages](https://github.com/github/pages-gem) from 197 to 198.
- [Release notes](https://github.com/github/pages-gem/releases)
- [Commits](https://github.com/github/pages-gem/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.2.10)
+    activesupport (4.2.11.1)
       i18n (~> 0.7)
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
@@ -31,10 +31,10 @@ GEM
     ffi (1.10.0)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
-    github-pages (197)
-      activesupport (= 4.2.10)
+    github-pages (198)
+      activesupport (= 4.2.11.1)
       github-pages-health-check (= 1.16.1)
-      jekyll (= 3.7.4)
+      jekyll (= 3.8.5)
       jekyll-avatar (= 0.6.0)
       jekyll-coffeescript (= 1.1.1)
       jekyll-commonmark-ghpages (= 0.1.5)
@@ -97,7 +97,7 @@ GEM
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.7.4)
+    jekyll (3.8.5)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)