Rubocop updates & binstubs

spec/yookassa_spec.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 RSpec.describe Yookassa do
-  it 'has a version number' do
+  it "has a version number" do
     expect(Yookassa::VERSION).not_to be nil
   end
 end