Adds email notifications for TravisCI builds (facebookarchive#1990)

Summary:
**Summary**

Adds claudiopro 's email for TravisCI build notifications. Feel free to do the same if you want to stay in the loop.

**Test Plan**

Wait for the next build to receive an email from TravisCI �‍♂️
Pull Request resolved: facebookarchive#1990

Reviewed By: elboman

Differential Revision: D13935604

Pulled By: elboman

fbshipit-source-id: 0a3020e65890793b82c87626f6da284ec310805c

.travis.yml

@@ -58,4 +58,10 @@ script:
   fi
 
 notifications:
+  email:
+    recipients:
+      - claudio.procida@gmail.com
+      - niveditc@gmail.com
+    on_success: change # send a notification when the build status changes
+    on_failure: always # always send a notification
   webhooks: https://code.facebook.com/travis/webhook/