Update Gemfile

Author: MartyEwings

Gemfile

@@ -35,7 +35,7 @@ group :development do
   gem "rubocop-rspec", '= 2.19.0',               require: false
   gem "rb-readline", '= 0.5.5',                  require: false, platforms: [:mswin, :mingw, :x64_mingw]
   gem "github_changelog_generator",              require: false
-  gem "octokit", '= 4.21.0',                     require: false
+  gem "faraday", '= 1.10.3',                     require: false
 end
 group :system_tests do
   gem "puppet_litmus", '~> 1.0', require: false, platforms: [:ruby, :x64_mingw]