Gemfile in stripe-5.17.0 vs Gemfile in stripe-5.18.0

@@ -7,10 +7,13 @@
 group :development do
   gem "coveralls", require: false
   gem "mocha", "~> 0.13.2"
   gem "rack", ">= 2.0.6"
   gem "rake"
-  gem "shoulda-context"
+
+  # Update to 2.0.0 once it ships.
+  gem "shoulda-context", "2.0.0.rc4"
+
   gem "test-unit"
 
   # Version doesn't matter that much, but this one contains some fixes for Ruby
   # 2.7 warnings that add noise to the test suite.
   gem "webmock", ">= 3.8.0"