Bump octokit from 4.13.0 to 4.21.0

Gemfile.lock

@@ -6,8 +6,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
     claide (1.0.2)
     claide-plugins (0.9.2)
       cork
@@ -48,7 +48,7 @@ GEM
       ffi (>= 1.3.0)
     eventmachine (1.2.7)
     execjs (2.7.0)
-    faraday (0.15.3)
+    faraday (0.17.4)
       multipart-post (>= 1.2, < 3)
     faraday-http-cache (1.3.1)
       faraday (~> 0.8)
@@ -230,12 +230,13 @@ GEM
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.11.3)
-    multipart-post (2.0.0)
+    multipart-post (2.1.1)
     nap (1.1.0)
     no_proxy_fix (0.1.2)
     nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
-    octokit (4.13.0)
+    octokit (4.21.0)
+      faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
     open4 (1.3.4)
     pathutil (0.16.2)
@@ -255,9 +256,9 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    sawyer (0.8.1)
-      addressable (>= 2.3.5, < 2.6)
-      faraday (~> 0.8, < 1.0)
+    sawyer (0.8.2)
+      addressable (>= 2.3.5)
+      faraday (> 0.8, < 2.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)