Update README.md

Author: gignac-cha

README.md

@@ -325,10 +325,9 @@ The `sb.setErrorFirstCallback(false)` returns callbacks to their original parame
 
 ## Changelogs
 
-## v3.0.148(MAR 31, 2021)
+## v3.0.149(APR 20, 2021)
 
 If you want to check the record of other versions, go to [Change Log](https://github.com/sendbird/Sendbird-SDK-JavaScript/blob/master/CHANGELOG.md).
 
-- Added `AppleCriticalAlertOptions` interface.
-- Added `appleCriticalAlertOptions` in `BaseMessage`, `UserMessageParams`, `FileMessageParams`, `ScheduledUserMessage`, and `ScheduledUserMessageParams`.
-- Downgraded log level from `ERROR` to `DEBUG` for all internal API calls.
+- Added `NONE` log level in `LogLevel`.
+- Improved stability.