bump fuubar

Gemfile

@@ -213,7 +213,7 @@ group :test do
 
   gem 'capybara', '~> 2.18.0'
   gem 'capybara-screenshot', '~> 1.0.14'
-  gem 'fuubar', '~> 2.2.0'
+  gem 'fuubar', '~> 2.3.1'
   gem 'capybara-select2', git: 'https://github.com/goodwill/capybara-select2', ref: '585192e'
   gem 'selenium-webdriver', '~> 3.11'
   gem 'timecop', '~> 0.9.0'

Gemfile.lock

@@ -282,7 +282,7 @@ GEM
     formatador (0.2.5)
     friendly_id (5.2.3)
       activerecord (>= 4.0.0)
-    fuubar (2.2.0)
+    fuubar (2.3.1)
       rspec-core (~> 3.0)
       ruby-progressbar (~> 1.4)
     get_process_mem (0.2.1)
@@ -652,7 +652,7 @@ DEPENDENCIES
   faker
   fog-aws
   friendly_id (~> 5.2.1)
-  fuubar (~> 2.2.0)
+  fuubar (~> 2.3.1)
   gon (~> 6.2.0)
   grape (~> 1.0)
   health_check