[TASK] Bump the development dependencies

Also add versioned schema information to the PHPUnit configuration
file so that the file can be auto-migrated later when we switch to
a newer version of PHPUnit.

composer.json

@@ -27,8 +27,8 @@
         "symfony/mime": "^4.4 || ^5.0 || ^6.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.5",
-        "typo3/coding-standards": "^0.4.0"
+        "phpunit/phpunit": "^8.5.36",
+        "typo3/coding-standards": "^0.6.1"
     },
     "bin": [
         "bin/tailor"

phpunit.xml.dist

@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit bootstrap="./tests/bootstrap.php">
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/8.5/phpunit.xsd"
+         bootstrap="./tests/bootstrap.php">
     <testsuites>
         <testsuite name="Unit">
             <directory>tests/Unit</directory>