Fix phpstan violations

phpstan.dist.neon

@@ -9,6 +9,14 @@ parameters:
         - '#^Method Behat\\Mink\\Tests\\Driver\\Custom\\[^:]+Test(Case)?\:\:test\w*\(\) has no return type specified\.$#'
         # instaclick/php-webdriver misses the @method for this magic method
         - '#^Call to an undefined method WebDriver\\Session\:\:file\(\)\.$#'
+        # W3C compatability changes
+        - '#^Call to an undefined method WebDriver\\Session\:\:getWindowHandles\(\)\.$#'
+        - '#^Call to an undefined method WebDriver\\Session\:\:getWindowHandle\(\)\.$#'
+        - '#^Call to an undefined method WebDriver\\Session\:\:postActions\(\)\.$#'
+        - '#^Call to an undefined method WebDriver\\Session\:\:deleteActions\(\)\.$#'
+        - '#^Call to an undefined method WebDriver\\Session|WebDriver\\Window\\:\:postRect\(\)\.$#'
+        - '#^Access to undefined constant WebDriver\\Element\:\:WEB_ELEMENT_ID\.$#'
+        - '#^Call to an undefined method WebDriver\\Element\:\:property\(\)\.$#'
 
 includes:
     - vendor/phpstan/phpstan-phpunit/extension.neon

src/Selenium2Driver.php

@@ -548,8 +548,6 @@ public function getScreenshot()
     public function getWindowNames()
     {
         if ($this->isW3C()) {
-            // This method doesn't exist in older versions of php-webdriver.
-            /** @phpstan-ignore-next-line variable.undefined */
             return $this->getWebDriverSession()->getWindowHandles();
         }
 
@@ -559,8 +557,6 @@ public function getWindowNames()
     public function getWindowName()
     {
         if ($this->isW3C()) {
-            // This method doesn't exist in older versions of php-webdriver.
-            /** @phpstan-ignore-next-line variable.undefined */
             return $this->getWebDriverSession()->getWindowHandle();
         }
 
@@ -667,8 +663,6 @@ public function getValue(string $xpath)
         }
 
         if ($this->isW3C()) {
-            // This method doesn't exist in older versions of php-webdriver.
-            /** @phpstan-ignore-next-line variable.undefined */
             return $element->property('value');
         }
 
@@ -1100,8 +1094,6 @@ public function wait(int $timeout, string $condition)
     public function resizeWindow(int $width, int $height, ?string $name = null)
     {
         if ($this->isW3C()) {
-            // This method doesn't exist in older versions of php-webdriver.
-            /** @phpstan-ignore-next-line variable.undefined */
             $this->getWebDriverSession()->window($name ? $name : 'current')->postRect(
                 array('width' => $width, 'height' => $height)
             );