build(deps-dev): update phpstan/phpstan requirement from 1.10.42 to 1…

….10.56 (#1756)

* build(deps-dev): update phpstan/phpstan requirement

Updates the requirements on [phpstan/phpstan](https://github.com/phpstan/phpstan) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/1.11.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.10.42...1.10.56)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

* menu.inc.php: fix PHPStan warning

> Variable $SubMenuBar in isset() always exists and is not nullable.

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Dan Hemberger <[email protected]>

composer.json

@@ -81,7 +81,7 @@
 	"require-dev": {
 		"fig-r/psr2r-sniffer": "1.4.0",
 		"overtrue/phplint": "9.0.4",
-		"phpstan/phpstan": "1.10.42",
+		"phpstan/phpstan": "1.10.56",
 		"phpunit/phpunit": "10.4.2",
 		"phpunit/php-code-coverage": "10.1.11",
 		"rector/rector": "0.15.13",

src/templates/Default/engine/Default/includes/menu.inc.php

@@ -14,7 +14,7 @@
 						}
 					}?>
 				</span><?php
-			} elseif (isset($SubMenuBar)) {
+			} else {
 				echo $SubMenuBar;
 			} ?>
 		</div>