Use phpunit 8

composer.json

@@ -25,12 +25,12 @@
     "require": {
         "php": "^7.2",
         "ext-json": "*",
-        "doctrine/cache": "^1.7",
-        "doctrine/doctrine-cache-bundle": "^1.3",
-        "guzzlehttp/guzzle": "^6.3",
-        "heise/shariff": "^8.0",
-        "sonata-project/admin-bundle": "^3.48",
-        "sonata-project/block-bundle": "^3.15",
+        "doctrine/cache": "^1.8",
+        "doctrine/doctrine-cache-bundle": "^1.3.5",
+        "guzzlehttp/guzzle": "^6.3.3",
+        "heise/shariff": "^8.2",
+        "sonata-project/admin-bundle": "^3.51",
+        "sonata-project/block-bundle": "^3.16.1",
         "sonata-project/core-bundle": "^3.17",
         "symfony/config": "^3.4 || ^4.2",
         "symfony/dependency-injection": "^3.4 || ^4.2",
@@ -43,7 +43,7 @@
         "symfony/twig-bundle": "^3.4 || ^4.2"
     },
     "require-dev": {
-        "bamarni/composer-bin-plugin": "^1.2",
+        "bamarni/composer-bin-plugin": "^1.3",
         "sllh/composer-lint": "^1.0"
     },
     "config": {

tests/DependencyInjection/Core23ShariffExtensionTest.php

@@ -47,7 +47,7 @@ public function testLoadFacebook(): void
         ]);
     }
 
-    protected function getContainerExtensions()
+    protected function getContainerExtensions(): array
     {
         return [
             new Core23ShariffExtension(),

vendor-bin/phpstan/composer.json

@@ -7,8 +7,5 @@
         "phpstan/phpstan-phpunit": "^0.11",
         "phpstan/phpstan-strict-rules": "^0.11",
         "phpstan/phpstan-symfony": "^0.11"
-    },
-    "conflict": {
-        "phpunit/phpunit": ">=8.0"
     }
 }

vendor-bin/test/composer.json

@@ -1,7 +1,7 @@
 {
     "require": {
-        "matthiasnoback/symfony-dependency-injection-test": "^3.0",
-        "phpunit/phpunit": "^7.4",
+        "matthiasnoback/symfony-dependency-injection-test": "^4.0",
+        "phpunit/phpunit": "^8.2",
         "symfony/phpunit-bridge": "^4.1"
     }
 }