message: ff: Make byteorder an optional dependency under the std feature flag
  Building ff with the std feature flag was previously broken because it
  required importing byteorder functionality behind the byteorder/std
  feature flag. We don't use byteorder inside ff in no_std mode, so we can
  just make it optional.
diff: @@ -11,7 +11,7 @@ repository = "https://github.com/ebfull/ff"
  edition = "2018"
  [dependencies]
  -byteorder = { version = "1", default-features = false }
  +byteorder = { version = "1", optional = true }
  ff_derive = { version = "0.4.0", path = "ff_derive", optional = true }
  rand_core = { version = "0.5", default-features = false }
  subtle = { version = "2.2.1", default-features = false, features = ["i128"] }
  @@ -19,7 +19,7 @@ subtle = { version = "2.2.1", default-features = false, features = ["i128"] }
  [features]
  default = ["std"]
  derive = ["ff_derive"]
  -std = []
  +std = ["byteorder"]
  [badges]
  maintenance = { status = "actively-developed" }
  