Upgrade faker to version 1.8.7

Gemfile

@@ -62,7 +62,7 @@ group :development, :test do
   gem 'bullet', '~> 5.5.1'
   gem 'byebug', '~> 9.1.0'
   gem 'factory_girl_rails', '~> 4.8.0'
-  gem 'faker', '~> 1.7.3'
+  gem 'faker', '~> 1.8.7'
   gem 'i18n-tasks', '~> 0.9.15'
   gem 'knapsack_pro', '~> 0.53.0'
   gem 'launchy', '~> 2.4.3'

Gemfile.lock

@@ -158,8 +158,8 @@ GEM
     factory_girl_rails (4.8.0)
       factory_girl (~> 4.8.0)
       railties (>= 3.0.0)
-    faker (1.7.3)
-      i18n (~> 0.5)
+    faker (1.8.7)
+      i18n (>= 0.7)
     faraday (0.12.1)
       multipart-post (>= 1.2, < 3)
     foundation-rails (6.2.4.0)
@@ -516,7 +516,7 @@ DEPENDENCIES
   devise_security_extension (~> 0.10.0)
   email_spec (~> 2.1.0)
   factory_girl_rails (~> 4.8.0)
-  faker (~> 1.7.3)
+  faker (~> 1.8.7)
   foundation-rails (~> 6.2.4.0)
   foundation_rails_helper (~> 2.0.0)
   graphiql-rails (~> 1.4.1)