Fix ESpeak to use Stdin instead of a shell argument

modules/welcomer/index.js

@@ -5,6 +5,6 @@ module.exports = function(bot, api) {
         const channel = await bot.channels.fetch(process.env.CHANNEL);
         await api.joinChannel(channel);
         
-        api.speak(channel, `Hi! I'm alive. It is now ${new Date().toLocaleTimeString()} on ${new Date().toLocaleDateString()}`,api.ttsEngines.watson);
+        api.speak(channel, `Hi! I'm alive. It is now ${new Date().toLocaleTimeString()} on ${new Date().toLocaleDateString()}`,api.ttsEngines.espeak, "en");
     })   
 }

tts/espeak/index.js

@@ -6,6 +6,7 @@ module.exports=class extends BaseEngine {
 		super('ESpeak','wav')
 	}
 	async getSpeechFile(text, filepath, voice='en', params={}) {
-		await spawn('espeak', ['-v', voice, '-w',filepath, text]);
+		let proc=await spawn('espeak', ['-v', voice, '-w',filepath, '--stdin']);
+		proc.stdin.end(text);
 	}
 }