MultiplexFeature and BatchFillNativeOrdersFeature (#140)

* WrappedFillFeature

* Address internal feedback

* create features/interfaces/ directory

* Split NativeOrdersFeature into mixins

* Rename mixins to use NativeOrders namespace

* Add BatchFillNativeOrdersFeature

* Rename WrapperFillFeature => MultiplexFeature and add natspec comments

* Emit LiquidityProviderSwap event

* post-rebase fixes

* Multiplex mainnet fork tests

* lint

* Add tests for batch fill functions

* Remove market functions

* Addres PR feedback

* Remove nested _batchFill calls from _multiHopFill

* Add BatchFillIncompleteRevertError type

* Use call{value: amount}() instead of transfer(amount)

* Remove outdated comment

* Update some comments

* Add events

* Address spot-check recommendations

* Remove-top level events, add ExpiredRfqOrder event

* Update changelog

* Change ExpiredRfqOrder event

* Update IZeroEx artifact and contract wrapper

packages/protocol-utils/src/revert-errors/native_orders.ts

@@ -110,6 +110,20 @@ export class OnlyOrderMakerAllowed extends RevertError {
     }
 }
 
+export class BatchFillIncompleteError extends RevertError {
+    constructor(orderHash?: string, takerTokenFilledAmount?: Numberish, takerTokenFillAmount?: Numberish) {
+        super(
+            'BatchFillIncompleteError',
+            'BatchFillIncompleteError(bytes32 orderHash, uint256 takerTokenFilledAmount, uint256 takerTokenFillAmount)',
+            {
+                orderHash,
+                takerTokenFilledAmount,
+                takerTokenFillAmount,
+            },
+        );
+    }
+}
+
 const types = [
     ProtocolFeeRefundFailed,
     OrderNotFillableByOriginError,
@@ -120,6 +134,7 @@ const types = [
     CancelSaltTooLowError,
     FillOrKillFailedError,
     OnlyOrderMakerAllowed,
+    BatchFillIncompleteError,
 ];
 
 // Register the types we've defined.