Bump github.com/onsi/ginkgo from 1.15.2 to 1.16.0

Bumps [github.com/onsi/ginkgo](https://github.com/onsi/ginkgo) from 1.15.2 to 1.16.0.
- [Release notes](https://github.com/onsi/ginkgo/releases)
- [Changelog](https://github.com/onsi/ginkgo/blob/master/CHANGELOG.md)
- [Commits](https://github.com/onsi/ginkgo/compare/v1.15.2...v1.16.0)

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/go-task/slim-sprig/network.go

@@ -0,0 +1,12 @@
+package sprig
+
+import (
+	"math/rand"
+	"net"
+)
+
+func getHostByName(name string) string {
+	addrs, _ := net.LookupHost(name)
+	//TODO: add error handing when release v3 comes out
+	return addrs[rand.Intn(len(addrs))]
+}