updated changelog

CHANGELOG-3.0.md

@@ -10,4 +10,13 @@
 * **POSSIBLE BREAKING** PHPUnit 8.x support. 
 > Upgrade Notice: If you face issues with conflicting PHPUnit classes or difference in method signatures, lock version for PHPUnit in composer.json: “phpunit/phpunit”:”^7.0.0”
 * **BREAKING** Multi-session testing disabled by default. Add `use \Codeception\Lib\Actor\Shared\Friend;` to enable `$I->haveFriend`.     
-* 
+* **BREAKING** [WebDriver] `pauseExecution` removed in favor of `$I->pause()`
+* [Interactive pause](https://codeception.com/docs/02-GettingStarted#Interactive-Pause) inside tests with `$I->pause();` command in debug mode added. Allows to write and debug test in realtime.
+* Introduced [Step Decorators](https://codeception.com/docs/08-Customization#Step-Decorators) - auto-generated actions around module and helper methods. As part of this feature implemented
+  * [Conditional Assertions](https://codeception.com/docs/03-AcceptanceTests#Conditional-Assertions) (`$I->canSee()`)
+  * [Retries](https://codeception.com/docs/03-AcceptanceTests#Retry) (`$I->retryClick()`); 
+  * [Silent Actions](https://codeception.com/docs/03-AcceptanceTests#A-B-Testing)(`$I->tryToClick`).
+* Print artifacts on test failure
+* [REST] Short API responses in debug mode with `shortDebugResponse` config option. See #5455 by @sebastianneubert 
+* [WebDriver] `switchToIFrame` allow to locate iframe by CSS/XPath.
+