[TASK] Allow installations with Symfony 7 (#1121)

Also update the minimum versions of `symfony/yaml` to be in line with
what TYPO3 11LTS and 12LTS allow/require.

As these are only development dependencies for this extension, no
changelog entry is needed.

composer.json

@@ -59,9 +59,9 @@
 		"saschaegerer/phpstan-typo3": "^1.9.1",
 		"seld/jsonlint": "^1.10.1",
 		"squizlabs/php_codesniffer": "^3.8.1",
-		"symfony/console": "^5.4 || ^6.4",
-		"symfony/translation": "^5.4 || ^6.4",
-		"symfony/yaml": "^5.3.6 || ^6.2.0",
+		"symfony/console": "^5.4 || ^6.4 || ^7.0",
+		"symfony/translation": "^5.4 || ^6.4 || ^7.0",
+		"symfony/yaml": "^5.4 || ^6.4 || ^7.0",
 		"tomasvotruba/type-coverage": "^0.2.1",
 		"typo3/cms-fluid-styled-content": "^11.5.4 || ^12.4.0",
 		"typo3/coding-standards": "^0.6.1",