Update demo discount codes + version bump

README.md

@@ -20,6 +20,10 @@ Admin User:
 Customer:
 - User: `test@test.com`
 - Password: `test`
+
+Discount code:
+- 10 amount: `DEMO_AMT10`
+- 10 percent: `DEMO_PCT10`
 ```
 
 ## Installation

package.json

@@ -1,6 +1,6 @@
 {
   "name": "express-cart",
-  "version": "1.1.15",
+  "version": "1.1.16",
   "description": "A fully functioning Node.js shopping cart with Stripe, PayPal and Authorize.net payments.",
   "private": false,
   "scripts": {