message: Mark go/hybrid/subtle as publicly visible.
diff: @@ -15,6 +15,7 @@ go_library(
  "subtle.go",
  ],
  importpath = "github.com/google/tink/go/hybrid/subtle",
  + visibility = ["//visibility:public"], # keep; used by non-Tink library
  deps = [
  "//keyset",
  "//proto/hpke_go_proto",
  @@ -48,5 +49,5 @@ go_test(
  alias(
  name = "go_default_library",
  actual = ":subtle",
  - visibility = ["//:__subpackages__"],
  + visibility = ["//visibility:public"], # keep; used by non-Tink library
  )
  