Initial simple client implementation

src/util/Constants.js

@@ -0,0 +1,24 @@
+'use strict';
+
+exports.WhatsWebURL = 'https://web.whatsapp.com/'
+
+exports.UserAgent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36';
+
+exports.DefaultOptions = {
+    puppeteer: {
+        headless: true
+    }
+}
+
+exports.Status = {
+    INITIALIZING: 0,
+    AUTHENTICATING: 1,
+    READY: 3
+}
+
+exports.Events = {
+    AUTHENTICATED: 'authenticated',
+    READY: 'ready',
+    MESSAGE_CREATE: 'message',
+    QR_RECEIVED: 'qr'
+}