Update Travis CI

.travis.yml

@@ -6,9 +6,9 @@ os:
   - windows
 
 go:
-  - "1.14"
   - "1.15"
   - "1.16"
+  - "1.17"
 
 before_install:
   - go get github.com/mattn/goveralls

README.md

@@ -117,8 +117,8 @@ In addition to 100% test coverage and no race conditions, this package is active
 
 [goreport-img]: https://goreportcard.com/badge/github.com/go-cmd/cmd
 [goreport-url]: https://goreportcard.com/report/github.com/go-cmd/cmd
-[build-img]: https://travis-ci.org/go-cmd/cmd.svg?branch=master
-[build-url]: https://travis-ci.org/go-cmd/cmd
+[build-img]: https://app.travis-ci.com/go-cmd/cmd.svg?branch=master
+[build-url]: https://app.travis-ci.com/go-cmd/cmd
 [cover-img]: https://coveralls.io/repos/github/go-cmd/cmd/badge.svg
 [cover-url]: https://coveralls.io/github/go-cmd/cmd
 [godoc-img]: https://godoc.org/github.com/go-cmd/cmd?status.svg

cmd_windows_internal_test.go

@@ -0,0 +1,14 @@
+// +build windows
+
+package cmd
+
+import (
+	"testing"
+)
+
+func TestTerminateProcess(t *testing.T) {
+	err := terminateProcess(123)
+	if err == nil {
+		t.Error("no error, expected one on terminating nonexisting PID")
+	}
+}