readme.md: added more info

readme.md

@@ -1,27 +1,35 @@
[Nette Tester](https://tester.nette.org): enjoyable unit testing
===============================================================
================================================================

[![Downloads this Month](https://img.shields.io/packagist/dm/nette/tester.svg)](https://packagist.org/packages/nette/tester)
[![Build Status](https://travis-ci.org/nette/tester.svg?branch=master)](https://travis-ci.org/nette/tester)
[![Build Status Windows](https://ci.appveyor.com/api/projects/status/github/nette/tester?branch=master&svg=true)](https://ci.appveyor.com/project/dg/tester/branch/master)
[![Latest Stable Version](https://poser.pugx.org/nette/tester/v/stable)](https://github.com/nette/tester/releases)
[![License](https://img.shields.io/badge/license-New%20BSD-blue.svg)](https://github.com/nette/tester/blob/master/license.md)


Introduction
------------

Nette Tester is a productive and enjoyable unit testing framework. It's used by
the [Nette Framework](https://nette.org) and is capable of testing any PHP code.

Documentation is available on the [Nette Tester website](https://tester.nette.org).
Read the [blog](https://blog.nette.org/category/tester/) for new information.


Installation
------------

The best way how to install is to [download a latest package](https://github.com/nette/tester/releases)
or use a Composer:
The recommended way to install Nette Tester is through Composer:

```
php composer.phar require --dev nette/tester
composer require nette/tester --dev
```

Nette Tester requires PHP 5.6.0 or later. Collecting and processing
Alternatively, you can download the [tester.phar](https://github.com/nette/tester/releases) file.

Nette Tester requires PHP 5.6.0 and supports PHP up to 7.2. Collecting and processing
code coverage information depends on Xdebug, or PHPDBG.


@@ -74,6 +82,7 @@ OK (1 tests, 0 skipped, 0.0 seconds)
Nette Tester prints dot for successful test, F for failed test
and S when the test has been skipped.


Assertions
----------