Update to parity-scale-codec (#3232)

* WIP: update codec

* WIP

* compiling

* WIP

* rename parity-scale-codec to codec

* WIP

* fix

* remove old comments

* use published crates

* fix expected error msg

* bump version

* fmt and fix

* remove old comment

* fix wrong decoding impl

* implement encode like for structures

* undo removal of old pending changes

* trailingzeroinput

* Apply suggestions from code review

Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com>
Co-Authored-By: DemiMarie-parity <48690212+DemiMarie-parity@users.noreply.github.com>

* update codec

* fmt

* version is 1.0.0

* show more error

* fmt

substrate/core/transaction-pool/src/api.rs

@@ -21,7 +21,7 @@ use std::{
 	marker::PhantomData,
 };
 use client::{runtime_api::TaggedTransactionQueue, blockchain::HeaderBackend};
-use parity_codec::Encode;
+use codec::Encode;
 use txpool;
 use primitives::{
 	H256,

substrate/core/transaction-pool/src/tests.rs

@@ -17,7 +17,7 @@
 
 use super::*;
 
-use parity_codec::Encode;
+use codec::Encode;
 use txpool::{self, Pool};
 use test_client::{runtime::{AccountId, Block, Hash, Index, Extrinsic, Transfer}, AccountKeyring::{self, *}};
 use sr_primitives::{