Pass objects on command.execute

Pass objects instead of using a switch statement.
Now I don't have to restart the bot whenever I add a new command
that needs specific arguments other than 'message'.

commands/.example

@@ -1,7 +1,7 @@
 module.exports = {
 	name: 'example name',
 	description: 'example description',
-	execute(message) {
+	execute({message}) {
 		//code
 	}
 };