Update README.md

Author: mhh1422

README.md

@@ -3,10 +3,12 @@ An elastic-search based session driver for Laravel 5.1
 
 ##How to use
  1. Require it via composer
+
     ```
     composer require itvisionsy/laravel-elastic-sessions
     ```
  2. Add it to the providers list in `config/app.php`:
+
     ```php
     'providers' => [
     //...
@@ -15,6 +17,7 @@ An elastic-search based session driver for Laravel 5.1
     ]
     ```
  3. Set the correct settings in `config/session.php`
+
     ```php
     "driver" => "elastic",
     "elastic" => [
@@ -29,6 +32,7 @@ An elastic-search based session driver for Laravel 5.1
 Elastic will detect the mapping by default, however, it is recommended to set the mapping explicitly.
 
 You can do so manually by applying this mapping to the index and type:
+
 ```json
 {
     "index":"set_the_index",
@@ -44,6 +48,7 @@ You can do so manually by applying this mapping to the index and type:
 ```
 
 Or simpler, the package can do it for you. You will need to tinker `./artisan tinker` and then set the mapping:
+
 ```php
 \ItvisionSy\LaravelElasticSessionDriver\ElasticSessionStore::putMapping();
 ```