Bump phpstan/phpstan from 2.1.12 to 2.1.13 in the development-dependencies group (#32)

* Bump phpstan/phpstan in the development-dependencies group

Bumps the development-dependencies group with 1 update: [phpstan/phpstan](https://github.com/phpstan/phpstan).


Updates `phpstan/phpstan` from 2.1.12 to 2.1.13
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/2.1.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@2.1.12...2.1.13)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-version: 2.1.13
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
...

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

* Fix PHPStan

---------

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

Author: dependabot[bot]

composer.lock

@@ -21,8 +21,11 @@
 
 	date_default_timezone_set('UTC');
 	assert($xlsxFastEditor->getWorkbookDateSystem() === 1900);
+	// @phpstan-ignore staticMethod.internal
 	assert(XlsxFastEditor::excelDateToDateTime(0.5, 1900)->format('c') === '1900-01-01T12:00:00+00:00');
+	// @phpstan-ignore staticMethod.internal
 	assert(XlsxFastEditor::excelDateToDateTime(32, 1900)->format('c') === '1900-02-01T00:00:00+00:00');
+	// @phpstan-ignore staticMethod.internal
 	assert(XlsxFastEditor::excelDateToDateTime(44865, 1904)->format('c') === '2026-11-01T00:00:00+00:00');
 
 	$sheet1 = $xlsxFastEditor->getWorksheetNumber('Sheet1');
@@ -82,6 +85,7 @@
 	}
 	assert($ex instanceof \InvalidArgumentException);
 
+	// @phpstan-ignore method.internal
 	$cellD4 = $row4->getCell('D4');
 	assert($cellD4 !== null);
 	assert($cellD4->getPreviousCell()?->getNextCell()?->name() === 'D4');