chore: added index.js for structures (#91)

- Allows for a cleaner integration (imo) in Client.js

src/Client.js

@@ -10,10 +10,7 @@ const { WhatsWebURL, UserAgent, DefaultOptions, Events, WAState } = require('./u
 const { ExposeStore, LoadUtils } = require('./util/Injected');
 const ChatFactory = require('./factories/ChatFactory');
 const ContactFactory = require('./factories/ContactFactory');
-const ClientInfo = require('./structures/ClientInfo');
+const { ClientInfo, Message, MessageMedia, Location } = require('./structures');
-const Message = require('./structures/Message');
-const MessageMedia = require('./structures/MessageMedia');
-const Location = require('./structures/Location');
 
 /**
  * Starting point for interacting with the WhatsApp Web API

src/structures/index.js

@@ -0,0 +1,13 @@
+module.exports = {
+    Base: require('./Base'),
+    BusinessContact: require('./BusinessContact'),
+    Chat: require('./Chat'),
+    ClientInfo: require('./ClientInfo'),
+    Contact: require('./Contact'),
+    GroupChat: require('./GroupChat'),
+    Location: require('./Location'),
+    Message: require('./Message'),
+    MessageMedia: require('./MessageMedia'),
+    PrivateChat: require('./PrivateChat'),
+    PrivateContact: require('./PrivateContact'),
+};