[Multilang] hardcode ABI into abi-gen-wrappers (#1883)

* Export artifacts and addresses from abi-gen-wrappers

* only export addresses, not artifacts

* abi-gen-wrappers no longer accept ContractAbi as constructor param

ABI is now hardcoded when wrapper is generated

* remove unused imports

* remove unused import

* changes after review

* fix method ordering

* update constructor args

* prettier

* statically enumerate ABI properties

* remove abi-gen-wrappers generated-wrappers from prettierignore

* add template for recursive components

* add `indexed` field for EventParameter

* prettier

* update known-good wrappers with ABIs and fix Python ABI loading

* remove generated-artifacts and update gitignore

contracts/dev-utils/test/lib_transaction_decoder.ts

@@ -1,4 +1,4 @@
-import { artifacts as exchangeArtifacts, IExchangeContract } from '@0x/contracts-exchange';
+import { IExchangeContract } from '@0x/contracts-exchange';
 import { chaiSetup, constants, provider, txDefaults, web3Wrapper } from '@0x/contracts-test-utils';
 import { BlockchainLifecycle } from '@0x/dev-utils';
 import { BigNumber } from '@0x/utils';
@@ -30,12 +30,7 @@ const signature =
 
 describe('LibTransactionDecoder', () => {
     let libTxDecoder: LibTransactionDecoderContract;
-    const exchangeInterface = new IExchangeContract(
-        exchangeArtifacts.Exchange.compilerOutput.abi,
-        constants.NULL_ADDRESS,
-        provider,
-        txDefaults,
-    );
+    const exchangeInterface = new IExchangeContract(constants.NULL_ADDRESS, provider, txDefaults);
     before(async () => {
         await blockchainLifecycle.startAsync();
         libTxDecoder = await LibTransactionDecoderContract.deployFrom0xArtifactAsync(