Support go1.13 (google#1279)

gmlewis · web-flow · commit 15d7aeff2e36 · 2019-09-07T16:14:32.000-04:00
Closes google#1273.
diff --git a/.travis.yml b/.travis.yml
@@ -2,7 +2,8 @@ language: go
 
 go:
   - "1.x"
-  - "1.11.x"
+  - "1.12.x"
+  - "1.13.x"
   - master
 
 matrix:
diff --git a/go.mod b/go.mod
@@ -9,3 +9,5 @@ require (
 	golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6 // indirect
 	google.golang.org/appengine v1.1.0
 )
+
+go 1.13

Original file line number	Diff line number	Diff line change
`@@ -9,3 +9,5 @@ require (`
`9`	`9`	`golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6 // indirect`
`10`	`10`	`google.golang.org/appengine v1.1.0`
`11`	`11`	`)`
	`12`	`+`
	`13`	`+go 1.13`