update gemfile

Signed-off-by: Patrick Münch <patrick.muench1111@gmail.com>

Author: atomic111

Gemfile

@@ -1,7 +1,18 @@
 # encoding: utf-8
+
 source 'https://rubygems.org'
 
+# pin dependency for Ruby 1.9.3 since bundler is not
+# detecting that net-ssh 3 does not work with 1.9.3
+if Gem::Version.new(RUBY_VERSION) <= Gem::Version.new('1.9.3')
+  gem 'net-ssh', '~> 2.9'
+end
+
 gem 'rake'
-gem 'serverspec', '~> 2.3.0'
-gem 'rubocop',    '~> 0.27'
+gem 'inspec', '~> 0'
+gem 'rubocop', '~> 0.36.0'
 gem 'highline', '~> 1.6.0'
+
+group :tools do
+  gem 'github_changelog_generator', '~> 1.12.0'
+end