generate new test that did already exist & update all module snippets with declaration

test/speechSynthesis/speechSynthesis.js

@@ -1,4 +1,4 @@
-module.exports = message => {
+module.exports = speechSynthesis = message => {
 const msg = new SpeechSynthesisUtterance(message);
 msg.voice = window.speechSynthesis.getVoices()[0];
 window.speechSynthesis.speak(msg);