Update shoulda-matchers

This outdated gem was the cause of those annoying MiniTest errors.

Also updates one use of `ensure_inclusion_of` which was deprecated in
favor of `validate_inclusion_of`.

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index a0f5b70de32..5c18a20af15 100644
--- a/Gemfile
+++ b/Gemfile
@@ -254,7 +254,7 @@ end
 
 group :test do
   gem "simplecov", require: false
-  gem "shoulda-matchers", "~> 2.1.0"
+  gem "shoulda-matchers", "~> 2.7.0"
   gem 'email_spec'
   gem "webmock"
   gem 'test_after_commit'