updated the min rust version tag

Author: rudib

packed_struct/Cargo.toml

@@ -4,7 +4,7 @@ description = "Binary-level structure packing and unpacking generator"
 repository = "https://github.com/hashmismatch/packed_struct.rs"
 homepage = "http://www.hashmismatch.net/libraries/packed-struct/"
 version = "0.10.0"
-rust = "1.51"
+rust-version = "1.51"
 authors = ["Rudi Benkovic <[email protected]>"]
 license = "MIT OR Apache-2.0"
 keywords = ["enum", "packing", "serialization"]