Relax PHP version constraint

composer.json

@@ -18,14 +18,15 @@
         }
     ],
     "require": {
-        "php": "^7.4",
+        "php": ">=7.4",
         "ext-mbstring": "*",
         "squirrelphp/debug": "^0.5"
     },
     "require-dev": {
         "ext-intl": "*",
         "bamarni/composer-bin-plugin": "^1.3",
         "captainhook/plugin-composer": "^5.0",
+        "phpunit/phpunit": "^9.0",
         "doctrine/annotations": "^1.5",
         "twig/twig": "^3.0",
         "symfony/form": "^4.2|^5.0",
@@ -56,7 +57,7 @@
         "psalm_base": "vendor/bin/psalm --set-baseline=psalm-baseline.xml",
         "phpunit": "vendor/bin/phpunit --colors=always",
         "phpunit_clover": "vendor/bin/phpunit --coverage-text --coverage-clover build/logs/clover.xml",
-        "codecoverage": "vendor/bin/phpunit --coverage-html tests/_reports",
+        "coverage": "vendor/bin/phpunit --coverage-html tests/_reports",
         "phpcs": "vendor/bin/phpcs --standard=ruleset.xml --extensions=php --cache=.phpcs-cache --colors src tests",
         "phpcsfix": "vendor/bin/phpcbf --standard=ruleset.xml --extensions=php --cache=.phpcs-cache src tests",
         "binupdate": "@composer bin all update --ansi",

phpunit.xml.dist

@@ -1,21 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
-
-<phpunit
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/9.1/phpunit.xsd"
-         backupGlobals="false"
-         colors="true"
-         bootstrap="vendor/autoload.php"
->
-    <testsuites>
-        <testsuite name="Unit Tests">
-            <directory>tests</directory>
-        </testsuite>
-    </testsuites>
-
-    <filter>
-        <whitelist>
-            <directory suffix=".php">src</directory>
-        </whitelist>
-    </filter>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd" backupGlobals="false" colors="true" bootstrap="vendor/autoload.php">
+  <coverage>
+    <include>
+      <directory suffix=".php">src</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="Unit Tests">
+      <directory>tests</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>