Update go to 1.12 in Travis

dmcgowan · dmcgowan · commit b852a4d01eb2 · 2019-09-26T16:16:09.000-07:00
Signed-off-by: Derek McGowan &lt;derek@mcgstyle.net&gt;
diff --git a/.travis.yml b/.travis.yml
@@ -7,7 +7,7 @@ services:
 language: go
 
 go:
-  - "1.11.x"
+  - "1.12.x"
 
 go_import_path: github.com/containerd/containerd
 
