Replace error-chain for client error (#2231)

* WIP: convert client error

* Remove error_chain for client error

* Ignore tx-pool error deprecation warning

* Update Cargo.lock files

* Fix tests

* Increment impl_version

* Derive From impls, remove allow(missing_docs)

* Remove space

* Remove redundant into()s

* Blockchain Error source

* Bump impl version

substrate/core/sr-api-macros/src/decl_runtime_apis.rs

@@ -637,7 +637,7 @@ impl<'a> ToClientSideDecl<'a> {
 								#crate_::runtime_api::NativeOrEncoded::Encoded(r) => {
 									<#ret_type as #crate_::runtime_api::Decode>::decode(&mut &r[..])
 										.ok_or_else(||
-											#crate_::error::ErrorKind::CallResultDecode(
+											#crate_::error::Error::CallResultDecode(
 												#function_name
 											).into()
 										)