[js] Updating changelog.md [skip ci]
-## v.next
+## v4.0.0-alpha.8
* Rolling back native support for Opera Browser
* Added new ieOptions capabilities:
* Added relative locators
* Added Chrome DevTools Protocol (CDP) support
+* Added support for BASIC authentication.
+* Added listener for DOM mutations.
+* Added support for listening out for console log events.
+* Added support listening js exceptions using CDP
### API Changes
