Drop support for Go 1.11
Depends on #2039 (closed), sort of.
Because Go 1.13 has been released, Go 1.11 will no longer get security updates from the Go team. We should stop supporting it.
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mention Go 1.12 as minimum version in gitaly repo -
gitlab-rails source install instructions specify go 1.12 as minimum -
if needed, source update instructions for next stable gitlab release mention go update -
omnibus builds using go 1.12 -
GDK uses go 1.12 -
helm charts Gitaly docker image uses go 1.12
Edited by Zeger-Jan van de Weg