README.md in mailtrap-2.1.2 vs README.md in mailtrap-2.2.0

@@ -50,9 +50,10 @@
 mail = Mailtrap::Mail::Base.new(
   from: { email: '[e-mail]', name: 'Mailtrap Test' },
   to: [
     { email: '[e-mail]' }
   ],
+  reply_to: { email: '[e-mail]', name: 'Mailtrap Reply-To' },
   subject: 'You are awesome!',
   text: "Congrats for sending test email with Mailtrap!"
 )
 
 # create client and send