Update letter opener, grpahql and sitemap gnerator gems

Gemfile

@@ -20,7 +20,7 @@ gem 'devise_security_extension', '~> 0.10.0'
 gem 'foundation-rails', '~> 6.2.4.0'
 gem 'foundation_rails_helper', '~> 2.0.0'
 gem 'graphiql-rails', '~> 1.4.1'
-gem 'graphql', '~> 1.7.7'
+gem 'graphql', '~> 1.7.8'
 gem 'groupdate', '~> 3.2.0'
 gem 'initialjs-rails', '~> 0.2.0.5'
 gem 'invisible_captcha', '~> 0.10.0'
@@ -44,7 +44,7 @@ gem 'rollbar', '~> 2.15.5'
 gem 'rubyzip', '~> 1.2.0'
 gem 'sass-rails', '~> 5.0', '>= 5.0.4'
 gem 'savon', '~> 2.11.1'
-gem 'sitemap_generator', '~> 6.0.0'
+gem 'sitemap_generator', '~> 6.0.1'
 gem 'social-share-button', '~> 1.1'
 gem 'sprockets', '~> 3.7.1'
 gem 'turbolinks', '~> 2.5.3'
@@ -66,7 +66,7 @@ group :development, :test do
   gem 'i18n-tasks', '~> 0.9.15'
   gem 'knapsack_pro', '~> 0.53.0'
   gem 'launchy', '~> 2.4.3'
-  gem 'letter_opener_web', '~> 1.3.1'
+  gem 'letter_opener_web', '~> 1.3.2'
   gem 'quiet_assets', '~> 1.1.0'
   gem 'spring', '~> 2.0.1'
   gem 'spring-commands-rspec', '~> 1.0.4'

Gemfile.lock

@@ -522,7 +522,7 @@ DEPENDENCIES
   foundation-rails (~> 6.2.4.0)
   foundation_rails_helper (~> 2.0.0)
   graphiql-rails (~> 1.4.1)
-  graphql (~> 1.7.7)
+  graphql (~> 1.7.8)
   groupdate (~> 3.2.0)
   i18n-tasks (~> 0.9.15)
   initialjs-rails (~> 0.2.0.5)
@@ -533,7 +533,7 @@ DEPENDENCIES
   kaminari (~> 1.1.1)
   knapsack_pro (~> 0.53.0)
   launchy (~> 2.4.3)
-  letter_opener_web (~> 1.3.1)
+  letter_opener_web (~> 1.3.2)
   mdl (~> 0.4.0)
   newrelic_rpm (~> 4.1.0.333)
   omniauth (~> 1.8.1)
@@ -561,7 +561,7 @@ DEPENDENCIES
   sass-rails (~> 5.0, >= 5.0.4)
   savon (~> 2.11.1)
   scss_lint (~> 0.54.0)
-  sitemap_generator (~> 6.0.0)
+  sitemap_generator (~> 6.0.1)
   social-share-button (~> 1.1)
   spring (~> 2.0.1)
   spring-commands-rspec (~> 1.0.4)