Added compatibility with Symfony ^6.0 (closes #32)

Author: mburtscher

README.md

@@ -21,13 +21,10 @@ See [ogp.me](http://ogp.me) for information on the Open Graph protocol.
 
 ## Installation
 
-The most flexible installation method is using Composer: Simply create a composer.json file in the root of your project:
-``` json
-{
-    "require": {
-        "fusonic/opengraph": "^2.0"
-    }
-}
+The most flexible installation method is using Composer:
+
+``` bash
+composer require fusonic/opengraph
 ```
 
 Install composer and run install command:

composer.json

@@ -24,15 +24,15 @@
     "require": {
         "php": "^7.4|^8.0",
         "ext-dom": "*",
-        "symfony/dom-crawler": "^3.0|^4.0|^5.0",
-        "symfony/css-selector": "^3.0|^4.0|^5.0",
+        "symfony/dom-crawler": "^3.0|^4.0|^5.0|^6.0",
+        "symfony/css-selector": "^3.0|^4.0|^5.0|^6.0",
         "fusonic/linq": "^1.0",
         "psr/http-client": "^1.0",
         "psr/http-factory": "^1.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.0",
-        "symfony/http-client": "^5.0",
+        "symfony/http-client": "^6.0",
         "nyholm/psr7": "^1.2"
     },
     "suggest": {