Merge pull request #439 from Microsoft/zhe-upgrade

upgrade gem

docs/Gemfile.lock

@@ -15,13 +15,14 @@ GEM
       execjs
     coffee-script-source (1.11.1)
     colorator (1.1.0)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.3)
     ethon (0.11.0)
       ffi (>= 1.3.0)
     execjs (2.7.0)
-    faraday (0.15.0)
+    faraday (0.15.3)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.23)
+    ffi (1.9.25)
+    ffi (1.9.25-x64-mingw32)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
     github-pages (170)
@@ -72,7 +73,7 @@ GEM
       octokit (~> 4.0)
       public_suffix (~> 2.0)
       typhoeus (~> 0.7)
-    html-pipeline (2.7.2)
+    html-pipeline (2.9.0)
       activesupport (>= 2)
       nokogiri (>= 1.4)
     i18n (0.9.5)
@@ -184,12 +185,14 @@ GEM
       jekyll (~> 3.3)
     minitest (5.11.3)
     multipart-post (2.0.0)
-    net-dns (0.8.0)
-    nokogiri (1.8.2)
+    net-dns (0.9.0)
+    nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
-    octokit (4.8.0)
+    nokogiri (1.8.5-x64-mingw32)
+      mini_portile2 (~> 2.3.0)
+    octokit (4.13.0)
       sawyer (~> 0.8.0, >= 0.5.3)
-    pathutil (0.16.1)
+    pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (2.0.5)
     rb-fsevent (0.10.3)
@@ -197,7 +200,7 @@ GEM
       ffi (>= 0.5.0, < 2)
     rouge (2.2.1)
     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)
@@ -212,10 +215,14 @@ GEM
       ethon (>= 0.8.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    unicode-display_width (1.3.2)
+    tzinfo-data (1.2018.7)
+      tzinfo (>= 1.0.0)
+    unicode-display_width (1.4.0)
+    wdm (0.1.1)
 
 PLATFORMS
   ruby
+  x64-mingw32
 
 DEPENDENCIES
   github-pages (= 170)
@@ -224,6 +231,7 @@ DEPENDENCIES
   jekyll-redirect-from
   jemoji
   tzinfo-data
+  wdm (~> 0.1.0)
 
 BUNDLED WITH
-   1.16.1
+   1.17.1