Documntation update for 2.0

Author: skymeyer

README.md

@@ -1,8 +1,5 @@
 # Vatsimphp [![Latest Stable Version](https://img.shields.io/github/release/skymeyer/vatsimphp.svg)](https://packagist.org/packages/skymeyer/vatsimphp) [![Total downloads](https://img.shields.io/packagist/dt/skymeyer/vatsimphp.svg)](https://packagist.org/packages/skymeyer/vatsimphp) [![Build Status](https://travis-ci.com/skymeyer/Vatsimphp.svg?branch=master)](https://travis-ci.com/skymeyer/Vatsimphp)
 
-
-**This is a development branch. For Vatsimphp v1.x (stable) documentation, [go here](https://github.com/skymeyer/Vatsimphp/blob/1.x/README.md).**
-
 Vatsimphp collects and parses the publically available statistics
 from the [VATSIM.net](http://www.vatsim.net) network. It provides
 iterators for the available data and basic search/filtering

docs/index.md

@@ -1,22 +1,26 @@
-**This is a development branch. For Vatsimphp v1.x (stable) documentation, [go here](https://github.com/skymeyer/Vatsimphp/blob/1.x/README.md).**
-
 Vatsimphp Documentation
 =======================
 
+## Requirements
+
+Vatsimphp requires PHP 7.2 or above. If you are running an older PHP version you can use Vatsimphp `^1.0` instead.
+However we highly recommend you upgrade your PHP environment to a [support PHP version](https://www.php.net/supported-versions.php).
+Vatsimphp will note make any bug fixes related to the usage of an unsupported PHP version.
+
 ## Installation
 
 Assuming you have already installed composer, run:
 
 ``` bash
-$ composer require skymeyer/vatsimphp dev-master
+$ composer require skymeyer/vatsimphp ^2.0
 ```
 
 Or add vatsimphp manually to your composer.json of your current project:
 
 ``` json
 {
     "require": {
-        "skymeyer/vatsimphp": "dev-master"
+        "skymeyer/vatsimphp": "^2.0"
     }
 }
 ```