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>

packages/contract-wrappers/src/index.ts

@@ -125,7 +125,6 @@ export {
     IZeroExContract,
     IZeroExEventArgs,
     IZeroExEvents,
-    IZeroExLiquidityProviderForMarketUpdatedEventArgs,
     IZeroExMetaTransactionExecutedEventArgs,
     IZeroExMigratedEventArgs,
     IZeroExOwnershipTransferredEventArgs,