fix typo in readme when specifying version

Author: Mulkave

readme.md

@@ -14,12 +14,14 @@ This will give you a Laravel 5.3 installation with Lucid out-of-the-box. If you
 
 ##### 5.2
 ```
-composer create-project lucid-arch/laravel=^5.2 my-project-5.2
+composer create-project lucid-arch/laravel=5.2.x my-project-5.2
 ```
 
+> Literally 5.2.x and not 5.2.0 or 5.2.1...
+
 ##### 5.1
 ```
-composer create-project lucid-arch/laravel=^5.1 my-project-5.1
+composer create-project lucid-arch/laravel=5.1.x my-project-5.1
 ```
 
 ## Getting Started