Update shoulda-matchers gem to 3.1.2

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Gemfile

@@ -353,7 +353,7 @@ group :development, :test do
 end
 group :test do
-  gem 'shoulda-matchers', '~> 2.8.0', require: false
+  gem 'shoulda-matchers', '~> 3.1.2', require: false
   gem 'email_spec', '~> 1.6.0'
   gem 'json-schema', '~> 2.6.2'
   gem 'webmock', '~> 2.3.2'

Gemfile.lock

@@ -774,8 +774,8 @@ GEM
     sexp_processor (4.9.0)
     sham_rack (1.3.6)
       rack
-    shoulda-matchers (2.8.0)
-      activesupport (>= 3.0.0)
+    shoulda-matchers (3.1.2)
+      activesupport (>= 4.0.0)
     sidekiq (5.0.4)
       concurrent-ruby (~> 1.0)
       connection_pool (~> 2.2, >= 2.2.0)
@@ -1084,7 +1084,7 @@ DEPENDENCIES
   sentry-raven (~> 2.5.3)
   settingslogic (~> 2.0.9)
   sham_rack (~> 1.3.6)
-  shoulda-matchers (~> 2.8.0)
+  shoulda-matchers (~> 3.1.2)
   sidekiq (~> 5.0)
   sidekiq-cron (~> 0.6.0)
   sidekiq-limit_fetch (~> 3.4)

spec/spec_helper.rb

@@ -148,3 +148,10 @@ FactoryGirl::SyntaxRunner.class_eval do
 end
 ActiveRecord::Migration.maintain_test_schema!
+
+Shoulda::Matchers.configure do |config|
+  config.integrate do |with|
+    with.test_framework :rspec
+    with.library :rails
+  end
+end