Unify typehints of parameter $name in methods addFilter()

On nette forum in this post: https://forum.nette.org/cs/36685-latte-addfilter-neni-tam-chyba#p227757 was reported error - mismatch between typehints of parameter $name in methods addFilter() in Nette\Bridges\ApplicationLatte\Template and Latte\Engine, the correct typehint is defined by typehint of second parameter of php function preg_match() which is string. Consequently the correct typehint of parameter $name in method Nette\Bridges\ApplicationLatte\Template::addFilter() is pure string not nullable string

src/Bridges/ApplicationLatte/Template.php

@@ -72,7 +72,7 @@ public function __toString(): string
 	/**
 	 * Registers run-time filter.
 	 */
-	public function addFilter(?string $name, callable $callback): static
+	public function addFilter(string $name, callable $callback): static
 	{
 		$this->latte->addFilter($name, $callback);
 		return $this;