Feature/liquidity provider sandbox (#16)

* Update liquidity provider feature to use sandbox

* add support for liquidity provider feature in the exchange proxy swap quote consumer

* Move to off-chain liquidity provider registry

* Update ILiquidityProvider interface

* Remove some unused artifacts and wrappers

* Consolidate ILiquidityProvider

* prettier

* lint

* Address PR feedback

* Add failover to sandbox

* Add test for failover behavior in LiquidityProviderSandbox

* Update changelogs

* Emit events for the new LiquidityProvider scenarios

* Fix swap quote consumer bug

* post-rebase fixes

* `@0x/contracts-zero-ex`: bump feature versions

* Add default field to TokenAdjacencyGraph

* update addresses

Co-authored-by: Lawrence Forman <me@merklejerk.com>

contracts/zero-ex/src/artifacts.ts

@@ -12,6 +12,7 @@ import * as FullMigration from '../generated-artifacts/FullMigration.json';
 import * as IAllowanceTarget from '../generated-artifacts/IAllowanceTarget.json';
 import * as IERC20Transformer from '../generated-artifacts/IERC20Transformer.json';
 import * as IFlashWallet from '../generated-artifacts/IFlashWallet.json';
+import * as ILiquidityProvider from '../generated-artifacts/ILiquidityProvider.json';
 import * as InitialMigration from '../generated-artifacts/InitialMigration.json';
 import * as IOwnableFeature from '../generated-artifacts/IOwnableFeature.json';
 import * as ISimpleFunctionRegistryFeature from '../generated-artifacts/ISimpleFunctionRegistryFeature.json';
@@ -54,4 +55,5 @@ export const artifacts = {
     LogMetadataTransformer: LogMetadataTransformer as ContractArtifact,
     BridgeAdapter: BridgeAdapter as ContractArtifact,
     LiquidityProviderFeature: LiquidityProviderFeature as ContractArtifact,
+    ILiquidityProvider: ILiquidityProvider as ContractArtifact,
 };