Support php 8

composer.json

@@ -11,9 +11,10 @@
     ],
     "minimum-stability": "stable",
     "require": {
-        "php": "^7.4",
+        "php": "^7.4|^8.0",
         "thecodingmachine/safe": "^1.1",
-        "symfony/property-info": "^4.0|^5.0"
+        "symfony/property-info": "^5.0",
+        "phpdocumentor/reflection-docblock": "^5.0"
     },
     "autoload": {
         "psr-4": {
@@ -35,10 +36,15 @@
     },
     "require-dev": {
         "doctrine/coding-standard": "^8.2",
-        "phpstan/phpstan": "^0.12.19",
+        "phpstan/phpstan": "^1.9",
         "phpunit/phpunit": "^9.1",
         "sensiolabs/security-checker": "^6.0",
         "squizlabs/php_codesniffer": "^3.5",
         "thecodingmachine/phpstan-safe-rule": "^1.0"
+    },
+    "config": {
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": true
+        }
     }
 }

docker-compose.yml

@@ -1,7 +1,7 @@
 version: '3.3'
 services:
   php-cli:
-    image: php:7.4
+    image: php:8.1
     command:
       - bash
       - "-c"