message: Change visibility back to public.
diff: @@ -128,6 +128,7 @@ py_library(
  name = "_jwt_format",
  srcs = ["_jwt_format.py"],
  srcs_version = "PY3",
  + visibility = ["//visibility:public"],
  deps = [
  ":_jwt_error",
  "//tink/proto:tink_py_pb2",
  