remove laravel 5.* support

remove laravel 5.5 note from readme

README.md

@@ -20,16 +20,13 @@ You are also welcome to use the Issue Tracker to set bugs, improvements or upgra
 
 ``` composer require dropelikeit/laravel-jms-serializer ```
 
-
+### Support note
+
+Laravel 5.* is no longer supported with release v2.0.0 and higher.
 
 ### How to use
 
-Laravel 5.5 and later uses Package Auto-Discovery, so you do not need to add the service provider manually. 
-For Laravel versions below 5.5, the package must be added manually, add the following line in the "providers" array in config/app.php:
-
-```php 
-    Dropelikeit\LaravelJmsSerializer\ServiceProvider::class,
-```
+Laravel uses Package Auto-Discovery, so you do not need to add the service provider manually. 
 
 For example, to use the JMS serializer in a controller, add the ResponseFactory in the constructor.
 

composer.json

@@ -11,9 +11,9 @@
     }
   ],
   "require": {
-    "illuminate/http": "^5.2|^6.0|^7.0",
-    "illuminate/support": "^5.2|^6.0|^7.0",
-    "illuminate/contracts": "^5.2|^6.0|^7.0",
+    "illuminate/http": "^6.0|^7.0",
+    "illuminate/support": "^6.0|^7.0",
+    "illuminate/contracts": "^6.0|^7.0",
     "jms/serializer": "^3.4",
     "doctrine/cache": "^1.10",
     "php": "^7.3"
@@ -41,7 +41,7 @@
     "friendsofphp/php-cs-fixer": "^2.16",
     "phpunit/phpunit": "^9.3",
     "nunomaduro/larastan": "^0.6.4",
-    "orchestra/testbench": "^3.2|^4.0|^5.0",
+    "orchestra/testbench": "^4.0|^5.0",
     "phpstan/phpstan-phpunit": "^0.12.16"
   },
   "scripts": {