Update README.md

Author: gilmaimon

README.md

@@ -293,4 +293,5 @@ Thanks for everyone who reported a bug, suggested a feature and contributed to t
 - **14/09/2019 (v0.4.11)** - Bugfixes - masking settings used to not get copied when using assignment between `WebsocketClient` instances. Also handshake validation is now case insensitive. Thank you [logdog2709](https://github.com/logdog2709) for pointing out the [issue](https://github.com/gilmaimon/ArduinoWebsockets/issues/34).
 - **12/10/2019 (v0.4.12)** - Patch - Messages are now sent as a single TCP buffer instead of separate messages. Thank you [elC0mpa](https://github.com/elC0mpa) for posting the [issue](https://github.com/gilmaimon/ArduinoWebsockets/issues/44).
 - **19/10/2019 (v0.4.13)** - Patch - added `yield` calls in order to prevent software-watchdog resets on esp8266 (on long messages). Thank you [elC0mpa](https://github.com/elC0mpa) for documenting and helping with the [issue](https://github.com/gilmaimon/ArduinoWebsockets/issues/43).
-- **22/11/2019 (v0.4.14)** - Added `rawData` and `c_str` as acccessors in `WebsocketsMessage` so now the raw data can be acccessed which should solve issue #32 and not break any existing sketch.
+- **22/11/2019 (v0.4.14)** - Added `rawData` and `c_str` as acccessors in `WebsocketsMessage` so now the raw data can be acccessed which should solve issue #32 and not break any existing sketch.
+- **24/02/20 (v0.4.15)** - Added `Origin` and `User-Agent` headers to requests sent by the library, this seems to be required by some servers. Thank you [imesut](https://github.com/imesut) for pointing out the issue.