Support ABI files with wasm (.contract output) (#2841)

* Support ABI files with wasm (.contract output)

* AbiBase exports

* Additional default exports

* Remove any

* Fix build

packages/api-derive/src/type/HeaderExtended.ts

@@ -17,7 +17,7 @@ const _Header = Struct.with(runtimeTypes.types.Header as any) as Constructor<Hea
  * @description
  * A [[Block]] header with an additional `author` field that indicates the block author
  */
-export default class HeaderExtended extends _Header {
+export class HeaderExtended extends _Header {
   readonly #author?: AccountId;
 
   constructor (registry: Registry, header?: Header, sessionValidators?: AccountId[]) {

packages/api-derive/src/type/SignedBlockExtended.ts

@@ -17,7 +17,7 @@ const _SignedBlock = Struct.with(runtimeTypes.types.SignedBlock as any) as Const
  * @description
  * A [[Block]] header with an additional `author` field that indicates the block author
  */
-export default class BlockExtended extends _SignedBlock {
+export class SignedBlockExtended extends _SignedBlock {
   readonly #author?: AccountId;
 
   constructor (registry: Registry, block?: SignedBlock, sessionValidators?: AccountId[]) {

packages/api-derive/src/type/index.ts

@@ -1,5 +1,5 @@
 // Copyright 2017-2020 @polkadot/api-derive authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-export { default as HeaderExtended } from './HeaderExtended';
-export { default as SignedBlockExtended } from './SignedBlockExtended';
+export { HeaderExtended } from './HeaderExtended';
+export { SignedBlockExtended } from './SignedBlockExtended';