build: 🔖 release 1.4.0

Author: lehuygiang28

package-lock.json

@@ -4,7 +4,7 @@
         "type": "git",
         "url": "git+https://github.com/lehuygiang28/vnpay.git"
     },
-    "version": "1.3.6",
+    "version": "1.4.0",
     "description": "An open-source nodejs library support to payment with VNPay",
     "main": "lib/index.js",
     "types": "lib/index.d.ts",