Update gem dependencies

Gemfile.lock

@@ -4,22 +4,22 @@ GEM
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
     colorator (1.1.0)
-    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)
-    eventmachine (1.2.5)
-    faraday (0.14.0)
+    eventmachine (1.2.7)
+    faraday (0.15.3)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.21)
+    ffi (1.9.25)
     forwardable-extended (2.6.0)
-    git (1.3.0)
+    git (1.5.0)
     http_parser.rb (0.6.0)
-    httparty (0.16.0)
+    httparty (0.16.2)
       multi_xml (>= 0.5.2)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.7.2)
+    jekyll (3.7.4)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -38,10 +38,10 @@ GEM
       sass (~> 3.4)
     jekyll-sitemap (1.2.0)
       jekyll (~> 3.3)
-    jekyll-watch (2.0.0)
+    jekyll-watch (2.1.2)
       listen (~> 3.0)
-    kramdown (1.16.2)
-    liquid (4.0.0)
+    kramdown (1.17.0)
+    liquid (4.0.1)
     liquid-c (3.0.0)
       liquid (>= 3.0.0)
     listen (3.1.5)
@@ -53,16 +53,16 @@ GEM
     multipart-post (2.0.0)
     octokit (4.8.0)
       sawyer (~> 0.8.0, >= 0.5.3)
-    pathutil (0.16.1)
+    pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
-    rb-fsevent (0.10.2)
+    public_suffix (3.0.3)
+    rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    rouge (3.1.1)
+    rouge (3.3.0)
     ruby_dep (1.5.0)
     safe_yaml (1.0.4)
-    sass (3.5.5)
+    sass (3.7.2)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -85,4 +85,4 @@ DEPENDENCIES
   octokit (~> 4.8.0)
 
 BUNDLED WITH
-   1.14.6
+   1.16.3