feat: add missing type hints (#413)

* feat: add missing type hints

* Compatibility with Symfony 4

Author: dunglas

composer.json

@@ -18,6 +18,8 @@
   ],
   "require": {
     "php": ">=7.1",
+    "ext-dom": "*",
+    "ext-libxml": "*",
     "php-webdriver/webdriver": "^1.8.2",
     "symfony/browser-kit": "^4.4 || ^5.0",
     "symfony/dom-crawler": "^4.4 || ^5.0",

phpstan.neon

@@ -17,4 +17,3 @@ parameters:
 		- '#Call to an undefined method DOMNode::getTagName\(\)\.#'
 		- '#Return type \(void\) of method Symfony\\Component\\Panther\\DomCrawler\\Crawler::clear\(\) should be compatible with return type \(Facebook\\WebDriver\\WebDriverElement\) of method Facebook\\WebDriver\\WebDriverElement::clear\(\)#'
 		- '#Method Symfony\\Component\\Panther\\DomCrawler\\Crawler::getIterator\(\) should return ArrayIterator&iterable<DOMNode> but returns ArrayIterator<mixed, Facebook\\WebDriver\\WebDriverElement>\.#'
-		- '#Method Symfony\\Component\\Panther\\DomCrawler\\Crawler::.+\(\) should return static\(Symfony\\Component\\Panther\\DomCrawler\\Crawler\) but returns Symfony\\Component\\Panther\\DomCrawler\\Crawler#'