add php ^8.0 support

Author: Ruben Hollevoet

composer.json

@@ -4,13 +4,13 @@
     "description": "Bundle that makes it easy to authenticate using Fas Open Id",
     "type": "symfony-bundle",
     "require": {
-        "php": "^7.1.3",
+        "php": "^7.1 || ^8.0",
         "ext-json": "*",
-        "doctrine/doctrine-bundle": "^1.11",
+        "doctrine/doctrine-bundle": "^1.12.13",
         "phpseclib/phpseclib": "^2.0",
         "symfony/framework-bundle": "^3.4 || ^4.3",
         "symfony/http-client": "^4.4",
-        "symfony/security": "^3.4.26 || ^4.4.7",
+        "symfony/security": "^3.4.49 || ^4.4.24",
         "symfony/monolog-bundle": "^3.3"
     },
     "autoload": {