text: update readme & changelog (#31)

* text: update readme & changelog

* update: text

* Revert "update: text"

This reverts commit c5fd9c9.

* text: update readme & changelog

* update: changelog text

Author: rajan-parmar

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.4.2] - 2020-02-13
+### Added
+- New method cartItemQuantitySet() to update quantity of a cart item directly.
+
 ## [1.4.1] - 2020-12-11
 ### Added
 - Support for PHP 8

README.md

@@ -199,6 +199,20 @@ public function decrementCartItem()
 }
 ```
 
+### Update user input quantity of a cart item
+```
+/**
+ * Update user input quantity.
+ *
+ * @return json
+ */
+public function cartItemQuantitySet()
+{
+    return cart()->setQuantityAt(request('cartItemIndex'), request('cartQuantity'));
+}
+
+```
+
 ### Clear cart
 ```
 /**