fix readme

README.md

@@ -52,6 +52,12 @@ resource => int // UncastableValueException
 
 Fairly simple, isn't it?
 
+## Installation
+
+```bash
+$ composer require zakirullin/mess
+```
+
 ## Dealing with mess
 
 ```php
@@ -80,12 +86,6 @@ $config['param']->findAsInt(); // 1
 As you you might notice, type casting is performed while using `(find|get)As*` methods.
 Having trouble grasping `get*()`/`find*()`? Check out brilliant [Ocramius's slides](https://ocramius.github.io/doctrine-best-practices/#/94).
 
-## Installation
-
-```bash
-$ composer require zakirullin/mess
-```
-
 ### Why one needs THAT naive type casting?
 
 Let's imagine a library that is configured that way:
@@ -123,4 +123,4 @@ And that's the worst thing about it. It will continue to work, though, not in a
 - Request `body`/`query` 
 - `API` response
 - Config
-- etc.
+- etc.