gitaly 1.78 fails to build with golang 1.11 undefined: strings.ReplaceAll

When building gitaly 1.78 on debian stable/buster, build fails with this error. Upto gitaly 1.72.1 build was working fine. It builds fine on debian unstable/sid with golanf 1.13. Would it be possible to continue supporting golang 1.11?

# gitlab.com/gitlab-org/gitaly/internal/praefect/config
src/gitlab.com/gitlab-org/gitaly/internal/praefect/config/config.go:180:14: undefined: strings.ReplaceAll
src/gitlab.com/gitlab-org/gitaly/internal/praefect/config/config.go:181:14: undefined: strings.ReplaceAll

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