Upgrade codec to 2.0 and bitvec to 0.20 (companion) (#2343)

* upgrade codec and bitvec

* "Update Substrate"

Co-authored-by: parity-processbot <>

polkadot/node/primitives/Cargo.toml

@@ -9,7 +9,7 @@ description = "Primitives types for the Node-side"
 futures = "0.3.12"
 polkadot-primitives = { path = "../../primitives" }
 polkadot-statement-table = { path = "../../statement-table" }
-parity-scale-codec = { version = "1.3.6", default-features = false, features = ["derive"] }
+parity-scale-codec = { version = "2.0.0", default-features = false, features = ["derive"] }
 runtime_primitives = { package = "sp-runtime", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 sp-core = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sp-consensus-vrf = { git = "https://github.com/paritytech/substrate", branch = "master" }

polkadot/node/primitives/src/lib.rs

@@ -44,13 +44,13 @@ pub mod approval;
 #[derive(Debug, Clone, PartialEq, Eq, Encode, Decode)]
 pub enum Statement {
 	/// A statement that a validator seconds a candidate.
-	#[codec(index = "1")]
+	#[codec(index = 1)]
 	Seconded(CommittedCandidateReceipt),
 	/// A statement that a validator has deemed a candidate valid.
-	#[codec(index = "2")]
+	#[codec(index = 2)]
 	Valid(CandidateHash),
 	/// A statement that a validator has deemed a candidate invalid.
-	#[codec(index = "3")]
+	#[codec(index = 3)]
 	Invalid(CandidateHash),
 }