message: Upgrade pnet to Rust 2021
diff: @@ -10,7 +10,7 @@ readme = "README.md"
  keywords = ["networking", "transport", "datalink", "packet", "protocol"]
  categories = ["network-programming", "parser-implementations"]
  build = "build.rs"
  -edition = "2018"
  +edition = "2021"
  [features]
  benchmark = []
  