MC-33067: Update magento2-infrastructure composer dependencies

- Add PHP 7.4 to composer.json

Author: xmav

composer.json

@@ -8,7 +8,7 @@
     ],
     "bin": ["bin/svc"],
     "require": {
-        "php": "~7.1.3||~7.2.0||~7.3.0",
+        "php": "~7.1.3||~7.2.0||~7.3.0||~7.4.0",
         "phpstan/phpdoc-parser": "^0.3.5",
         "symfony/console": "~4.1.0||~4.4.0",
         "tomzx/php-semver-checker": "^0.13.0",