Update PHPUnit configuration

.gitignore

@@ -1,7 +1,7 @@
 /.idea
 /.php-cs-fixer.php
 /.php-cs-fixer.cache
-/.phpunit.result.cache
+/.phpunit.cache
 /.psalm/cache
 /composer.lock
 /vendor

phpunit.xml

@@ -1,22 +1,23 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.0/phpunit.xsd"
          bootstrap="vendor/autoload.php"
+         cacheDirectory=".phpunit.cache"
          executionOrder="depends,defects"
          forceCoversAnnotation="true"
          beStrictAboutCoversAnnotation="true"
          beStrictAboutOutputDuringTests="true"
-         beStrictAboutTodoAnnotatedTests="true"
          failOnRisky="true"
          failOnWarning="true"
+         colors="true"
          verbose="true">
     <testsuites>
         <testsuite name="default">
-            <directory suffix="Test.php">tests</directory>
+            <directory>tests</directory>
         </testsuite>
     </testsuites>
 
-    <coverage processUncoveredFiles="true">
+    <coverage>
         <include>
             <directory suffix=".php">src</directory>
         </include>