Add React Conf Brasil 2019 to conferences (#2356)

content/community/conferences.md

@@ -37,6 +37,11 @@ October 25, 2019 in London, UK
 
 [Website](https://reactadvanced.com) - [Twitter](http://twitter.com/reactadvanced) - [Facebook](https://www.facebook.com/ReactAdvanced) - [Videos](https://youtube.com/c/ReactConferences)
 
+### React Conf Brasil 2019 {#react-conf-2019}
+October 19, 2019 in São Paulo, BR
+
+[Website](https://reactconf.com.br/) - [Twitter](https://twitter.com/reactconfbr) - [Facebook](https://www.facebook.com/ReactAdvanced) - [Slack](https://react.now.sh/)
+
 ### React Day Berlin 2019 {#react-day-berlin-2019}
 December 6, 2019 in Berlin, Germany