.travis.yml: Update travis

corona10 · corona10 · commit c61f6c69fb72 · 2019-03-19T00:06:41.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,7 +7,7 @@ go:
   - 1.9.x
   - 1.10.x
   - 1.11.x
-  - master
+  - 1.12.x
 
 before_install:
   - go get github.com/axw/gocov/gocov
