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/core/provisioner/Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2018"
 
 [dependencies]
-bitvec = { version = "0.17.4", default-features = false, features = ["alloc"] }
+bitvec = { version = "0.20.1", default-features = false, features = ["alloc"] }
 futures = "0.3.12"
 tracing = "0.1.22"
 tracing-futures = "0.2.4"

polkadot/node/core/provisioner/src/lib.rs

@@ -367,7 +367,7 @@ fn select_availability_bitfields(
 
 		for (idx, _) in cores.iter().enumerate().filter(|v| !v.1.is_occupied()) {
 			// Bit is set for an unoccupied core - invalid
-			if *bitfield.payload().0.get(idx).unwrap_or(&false) {
+			if *bitfield.payload().0.get(idx).as_deref().unwrap_or(&false) {
 				continue 'a
 			}
 		}