Merge pull request #18 from ranjanrak/master

feat: Add note about the previous version for PHP < 7.3 in README

CHANGELOG.md

@@ -2,6 +2,14 @@
 
 All notable changes to `phpkiteconnect` will be documented in this file.
 
+## 4.0.0 - 2021-04-06
+- Major refactor to project structure and code
+- PHP support 7.3+
+- Integrated composer packagist 
+- Integrated Guzzle HTTP client ditching CURL
+- Units Tests
+
+
 ## 1.0.0 - 202X-XX-XX
 
 - initial release

README.md

@@ -1,6 +1,7 @@
 # The Kite Connect API PHP client - v3
-The Official PHP client for communicating with the [Kite Connect API](https://kite.trade).
+The Official PHP client for communicating with the [Kite Connect API](https://kite.trade).<br />
 
+Note: For PHP version < 7.3. You can refer to our [previous version](https://github.com/zerodha/phpkiteconnect/releases/tag/v3.0.0).  
 Kite Connect is a set of REST-like APIs that expose many capabilities required to build a complete investment and trading platform. Execute orders in real time, manage user portfolio and more, with the simple HTTP API collection.
 
 [Zerodha Technology](http://zerodha.com) (c) 2021. Licensed under the MIT License.
@@ -18,6 +19,7 @@ You can install the package via composer:
 ```bash
 composer require zerodha/phpkiteconnect
 ```
+Note: You can refer to our previous version [here](https://github.com/zerodha/phpkiteconnect/releases/tag/v3.0.0) for PHP version < 7.3.
 
 ## Usage
 ```php