Update octokit gem to version 4.3.0

Gemfile

@@ -315,7 +315,7 @@ end
 
 gem "newrelic_rpm", '~> 3.14'
 
-gem 'octokit', '~> 3.8.0'
+gem 'octokit', '~> 4.3.0'
 
 gem "mail_room", "~> 0.6.1"
 

Gemfile.lock

@@ -485,8 +485,8 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (~> 1.2)
-    octokit (3.8.0)
-      sawyer (~> 0.6.0, >= 0.5.3)
+    octokit (4.3.0)
+      sawyer (~> 0.7.0, >= 0.5.3)
     omniauth (1.3.1)
       hashie (>= 1.2, < 4)
       rack (>= 1.0, < 3)
@@ -712,8 +712,8 @@ GEM
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
-    sawyer (0.6.0)
-      addressable (~> 2.3.5)
+    sawyer (0.7.0)
+      addressable (>= 2.3.5, < 2.5)
       faraday (~> 0.8, < 0.10)
     scss_lint (0.47.1)
       rake (>= 0.9, < 11)
@@ -968,7 +968,7 @@ DEPENDENCIES
   newrelic_rpm (~> 3.14)
   nokogiri (~> 1.6.7, >= 1.6.7.2)
   oauth2 (~> 1.0.0)
-  octokit (~> 3.8.0)
+  octokit (~> 4.3.0)
   omniauth (~> 1.3.1)
   omniauth-auth0 (~> 1.4.1)
   omniauth-azure-oauth2 (~> 0.0.6)