Update chef-sugar to fix a conflict in Chef 16+

cookbooks/chef-sugar/spec/support/shared_examples.rb

@@ -0,0 +1,20 @@
+module RSpec
+  shared_examples 'a chef sugar' do
+    it 'acts as a singleton' do
+      described_class.module_eval("def foo; 'result'; end")
+      klass = Class.new.tap { |k| k.send(:include, described_class) }
+      expect(described_class.foo).to eq(klass.new.foo)
+    end
+
+    described_class.instance_methods.each do |name|
+      it "defines a `#{name}` DSL method" do
+        expect(Chef::Sugar::DSL).to be_method_defined(name)
+      end
+
+      it 'has n-1 arity from the parent method' do
+        method = Chef::Sugar::DSL.instance_method(name)
+        expect(method.arity).to eq(described_class.method(name).arity - 1)
+      end
+    end
+  end
+end