update travis

LyricTian · LyricTian · commit af8692c8a617 · 2018-05-08T23:22:22.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -5,5 +5,7 @@ go:
   - 1.7
 services:
   - redis-server
+before_install:
+  - go get github.com/mattn/goveralls
 script:
   - $HOME/gopath/bin/goveralls -service=travis-ci
