Revert "ci: use xenial instead of trusty (#1064)"
Revert "ci: use xenial instead of trusty (#1064)"

This reverts commit 6fecaf97e8e4a6d7a5af2837e2c130ee019c2802.

goreleaser/goreleaser,goreleaser/goreleaser,goreleaser/releaser,goreleaser/goreleaser