diff --git a/Gemfile.lock b/Gemfile.lock
index b6703e2..fab81e1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,17 +1,17 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.0)
+    activesupport (5.2.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
-    ast (2.3.0)
-    autoprefixer-rails (8.6.4)
+    ast (2.4.0)
+    autoprefixer-rails (9.3.1)
       execjs
-    bootstrap (4.1.1)
+    bootstrap (4.1.3)
       autoprefixer-rails (>= 6.0.3)
       popper_js (>= 1.12.9, < 2)
       sass (>= 3.5.2)
@@ -21,9 +21,9 @@ GEM
     coffee-script-source (1.11.1)
     colorator (1.1.0)
     colorize (0.8.1)
-    commonmarker (0.17.9)
+    commonmarker (0.17.13)
       ruby-enum (~> 0.5)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.3)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
@@ -33,16 +33,16 @@ GEM
     execjs (2.7.0)
     extras (0.3.0)
       forwardable-extended (~> 2.5)
-    faraday (0.15.2)
+    faraday (0.15.3)
       multipart-post (>= 1.2, < 3)
-    fastimage (2.1.3)
+    fastimage (2.1.4)
     ffi (1.9.25)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
-    html-pipeline (2.8.3)
+    html-pipeline (2.9.1)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    html-proofer (3.9.1)
+    html-proofer (3.9.2)
       activesupport (>= 4.2, < 6.0)
       addressable (~> 2.3)
       colorize (~> 0.8)
@@ -54,7 +54,8 @@ GEM
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.8.3)
+    jaro_winkler (1.5.1)
+    jekyll (3.8.5)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -67,7 +68,7 @@ GEM
       pathutil (~> 0.9)
       rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
-    jekyll-assets (3.0.11)
+    jekyll-assets (3.0.12)
       activesupport (~> 5.0)
       execjs (~> 2.7)
       extras (~> 0.2)
@@ -86,13 +87,12 @@ GEM
     jekyll-commonmark (1.2.0)
       commonmarker (~> 0.14)
       jekyll (>= 3.0, < 4.0)
-    jekyll-commonmark-ghpages (0.1.5)
+    jekyll-commonmark-ghpages (0.1.0)
       commonmarker (~> 0.17.6)
       jekyll-commonmark (~> 1)
-      rouge (~> 2)
     jekyll-default-layout (0.1.4)
       jekyll (~> 3.0)
-    jekyll-feed (0.10.0)
+    jekyll-feed (0.11.0)
       jekyll (~> 3.3)
     jekyll-gist (1.5.0)
       octokit (~> 4.2)
@@ -162,15 +162,15 @@ GEM
       jekyll-seo-tag (~> 2.0)
     jekyll-titles-from-headings (0.5.1)
       jekyll (~> 3.3)
-    jekyll-watch (2.0.0)
+    jekyll-watch (2.1.2)
       listen (~> 3.0)
-    jemoji (0.10.0)
+    jemoji (0.10.1)
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (~> 3.0)
     kramdown (1.17.0)
     libv8 (3.16.14.19)
-    liquid (4.0.0)
+    liquid (4.0.1)
     liquid-tag-parser (1.9.0)
       extras (~> 0.3)
       liquid (>= 3.0, < 5.0)
@@ -186,39 +186,40 @@ GEM
       jekyll-seo-tag (~> 2.1)
     minitest (5.11.3)
     multipart-post (2.0.0)
-    nokogiri (1.8.3)
+    nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
-    octokit (4.9.0)
+    octokit (4.13.0)
       sawyer (~> 0.8.0, >= 0.5.3)
     parallel (1.12.1)
-    parser (2.4.0.2)
-      ast (~> 2.3)
-    pathutil (0.16.1)
+    parser (2.5.3.0)
+      ast (~> 2.4.0)
+    pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    popper_js (1.12.9)
-    powerpack (0.1.1)
-    public_suffix (3.0.2)
+    popper_js (1.14.5)
+    powerpack (0.1.2)
+    public_suffix (3.0.3)
     rack (2.0.6)
     rainbow (3.0.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
     ref (2.0.0)
-    rouge (2.2.1)
-    rubocop (0.52.0)
+    rouge (3.3.0)
+    rubocop (0.60.0)
+      jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
-      parser (>= 2.4.0.2, < 3.0)
+      parser (>= 2.5, != 2.5.1.1)
       powerpack (~> 0.1)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.0, >= 1.0.1)
+      unicode-display_width (~> 1.4.0)
     ruby-enum (0.7.2)
       i18n
-    ruby-progressbar (1.9.0)
+    ruby-progressbar (1.10.0)
     ruby_dep (1.5.0)
-    rubyzip (1.2.1)
+    rubyzip (1.2.2)
     safe_yaml (1.0.4)
-    sass (3.5.6)
+    sass (3.7.2)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -235,11 +236,11 @@ GEM
       libv8 (~> 3.16.14.15)
       ref
     thread_safe (0.3.6)
-    typhoeus (1.3.0)
+    typhoeus (1.3.1)
       ethon (>= 0.9.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.1.14)
+    uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.4.0)
     yell (2.0.7)
@@ -250,9 +251,9 @@ PLATFORMS
 DEPENDENCIES
   activesupport
   autoprefixer-rails
-  bootstrap (~> 4.1.1)
+  bootstrap (~> 4.1.2)
   html-proofer
-  jekyll
+  jekyll (~> 3.8.4)
   jekyll-assets (~> 3.0.9)
   jekyll-avatar
   jekyll-coffeescript
@@ -291,9 +292,10 @@ DEPENDENCIES
   listen
   mercenary
   minima
-  rack (>= 2.0.6)
+  rack (~> 2.0.6)
   rouge
   rubocop
+  rubyzip (~> 1.2.2)
   sprockets
   terminal-table
   therubyracer