added raven-go to .travis.yml
diff --git a/.travis.yml b/.travis.yml
index d5a559f..c3af3ce 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,3 +7,4 @@
   - go get github.com/stretchr/testify
   - go get github.com/stvp/go-udp-testing
   - go get github.com/tobi/airbrake-go
+  - go get github.com/getsentry/raven-go