Updated README.md

Author: Andrey Helldar

README.md

@@ -29,6 +29,13 @@ Instead, you may of course manually update your `require` block and run `compose
 }
 ```
 
+### Upgrade from `andrey-helldar/pretty-array`
+
+1. Replace `"andrey-helldar/pretty-array": "^2.0"` with `"dragon-code/pretty-array": "^3.0"` in the `composer.json` file;
+2. Replace `Helldar\PrettyArray\Contracts\Caseable` with `DragonCode\Contracts\Pretty\Arr\Caseable`;
+3. Replace `Helldar\PrettyArray` namespace prefix with `DragonCode\PrettyArray`; 
+4. Call the `composer update` console command.
+
 ## Introduction
 
 > Q: Why did you create this package when there is a cooler [symfony/var-exporter](https://github.com/symfony/var-exporter)?