Comment <extensions> tag before PHPUnit 9.6 (#1219)

phpunit/phpunit/9.6/.env.test

@@ -0,0 +1,6 @@
+# define your env variables for the test env here
+KERNEL_CLASS='App\Kernel'
+APP_SECRET='$ecretf0rt3st'
+SYMFONY_DEPRECATIONS_HELPER=999999
+PANTHER_APP_ENV=panther
+PANTHER_ERROR_SCREENSHOT_DIR=./var/error-screenshots

phpunit/phpunit/9.6/manifest.json

@@ -0,0 +1,11 @@
+{
+    "copy-from-recipe": {
+        ".env.test": ".env.test",
+        "phpunit.xml.dist": "phpunit.xml.dist",
+        "tests/": "tests/"
+    },
+    "gitignore": [
+        "/phpunit.xml",
+        ".phpunit.result.cache"
+    ]
+}

phpunit/phpunit/9.6/phpunit.xml.dist

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!-- https://phpunit.readthedocs.io/en/latest/configuration.html -->
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+         backupGlobals="false"
+         colors="true"
+         bootstrap="tests/bootstrap.php"
+         convertDeprecationsToExceptions="false"
+>
+    <php>
+        <ini name="display_errors" value="1" />
+        <ini name="error_reporting" value="-1" />
+        <server name="APP_ENV" value="test" force="true" />
+        <server name="SHELL_VERBOSITY" value="-1" />
+        <server name="SYMFONY_PHPUNIT_REMOVE" value="" />
+        <server name="SYMFONY_PHPUNIT_VERSION" value="9.5" />
+    </php>
+
+    <testsuites>
+        <testsuite name="Project Test Suite">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+
+    <coverage processUncoveredFiles="true">
+        <include>
+            <directory suffix=".php">src</directory>
+        </include>
+    </coverage>
+
+    <listeners>
+        <listener class="Symfony\Bridge\PhpUnit\SymfonyTestsListener" />
+    </listeners>
+
+    <extensions>
+    </extensions>
+</phpunit>

phpunit/phpunit/9.6/tests/bootstrap.php

@@ -0,0 +1,11 @@
+<?php
+
+use Symfony\Component\Dotenv\Dotenv;
+
+require dirname(__DIR__).'/vendor/autoload.php';
+
+if (file_exists(dirname(__DIR__).'/config/bootstrap.php')) {
+    require dirname(__DIR__).'/config/bootstrap.php';
+} elseif (method_exists(Dotenv::class, 'bootEnv')) {
+    (new Dotenv())->bootEnv(dirname(__DIR__).'/.env');
+}