Fix inconsistency POST function signatures

Author: robocoder

lib/WebDriver/Alert.php

@@ -19,7 +19,7 @@
  * @method array accept() Accept alert.
  * @method array dismiss() Dismiss alert.
  * @method array getText() Get alert text.
- * @method array postText() Send alert text.
+ * @method array postText($json) Send alert text.
  */
 class Alert extends AbstractWebDriver
 {

lib/WebDriver/Session.php

@@ -18,7 +18,7 @@
  *
  * @method void accept_alert() Accepts the currently displayed alert dialog.
  * @method array deleteActions() Release actions.
- * @method array postActions() Perform actions.
+ * @method array postActions($json) Perform actions.
  * @method string getAlert_text() Gets the text of the currently displayed JavaScript alert(), confirm(), or prompt() dialog.
  * @method void postAlert_text($jsonText) Sends keystrokes to a JavaScript prompt() dialog.
  * @method void back() Navigates backward in the browser history, if possible.

lib/WebDriver/Window.php

@@ -23,7 +23,7 @@
  * @method array getPosition() Get position of the window.
  * @method void postPosition($json) Change position of the window.
  * @method array getRect() Get window rect.
- * @method array postRect() Set window rect.
+ * @method array postRect($json) Set window rect.
  */
 class Window extends AbstractWebDriver
 {