Gemfile in roadie-4.0.0 vs Gemfile in roadie-5.0.0

@@ -1,7 +1,10 @@
 # frozen_string_literal: true
 
-source 'https://rubygems.org'
+source "https://rubygems.org"
 gemspec
 
 # Added here so it does not show up on the Gemspec; I only want it for CI builds
-gem 'codecov', group: :test, require: false
+gem "codecov", group: :test, require: false
+# Not actually required to run the tests for the gem, but a real convenience
+# for local development.
+gem "standard", group: [:test, :development], require: false