move to rust 2021

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "parity-wasm"
-version = "0.44.0"
+version = "0.45.0"
 authors = ["Nikolay Volf <nikvolf@gmail.com>", "Svyatoslav Nikolsky <svyatonik@yandex.ru>", "Sergey Shulepov <s.pepyakin@gmail.com>"]
 license = "MIT/Apache-2.0"
 readme = "README.md"
@@ -11,7 +11,8 @@ description = "WebAssembly low-level format library"
 keywords = ["wasm", "webassembly", "bytecode", "serde", "interpreter"]
 categories = ["wasm", "parser-implementations"]
 include = ["src/**/*", "LICENSE-*", "README.md"]
-edition = "2018"
+edition = "2021"
+rust-version = "1.56.1"
 
 [workspace]
 members = ["testsuite"]

fuzz/Cargo.toml

@@ -4,6 +4,8 @@ name = "parity-wasm-fuzz"
 version = "0.0.1"
 authors = ["Pat Hickey phickey@fastly.com"]
 publish = false
+edition = "2021"
+rust-version = "1.56.1"
 
 [package.metadata]
 cargo-fuzz = true

src/elements/types.rs

@@ -123,7 +123,6 @@ impl Deserialize for BlockType {
 			-0x05 => Ok(BlockType::Value(ValueType::V128)),
 			#[cfg(feature = "multi_value")]
 			idx => {
-				use core::convert::TryInto;
 				let idx = idx.try_into().map_err(|_| Error::UnknownBlockType(idx))?;
 				Ok(BlockType::TypeIndex(idx))
 			},

testsuite/Cargo.toml

@@ -8,7 +8,8 @@ readme = "README.md"
 repository = "https://github.com/nikvolf/parity-wasm"
 homepage = "https://github.com/nikvolf/parity-wasm"
 description = "parity-wasm testsuite"
-edition = "2018"
+edition = "2021"
+rust-version = "1.56.1"
 
 [dependencies]
 wast = "38"