Bump shoulda-matchers to 4.0.1

This removes the warning when using Ruby 2.6:

BigDecimal.new is deprecated; use BigDecimal() method instead.

This also adds Rails 5 support, which eliminates the need for the monkey
patch to handle
https://github.com/thoughtbot/shoulda-matchers/issues/913.

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index b6804a94971..e2842ca27db 100644
--- a/Gemfile
+++ b/Gemfile
@@ -379,7 +379,7 @@ group :development, :test do
 end
 
 group :test do
-  gem 'shoulda-matchers', '~> 3.1.2', require: false
+  gem 'shoulda-matchers', '~> 4.0.1', require: false
   gem 'email_spec', '~> 2.2.0'
   gem 'json-schema', '~> 2.8.0'
   gem 'webmock', '~> 3.5.1'