gdexlab/go-render disappeared

[rhafer]

The github.com/gdexlab/go-render module that reva is using in a couple of places (e.g.

reva/internal/http/services/archiver/handler.go

Line 46 in c71d5a1

"github.com/gdexlab/go-render/render"

) is no longer available on github. Would be good to find a replacement.