update abi-gen with new method interfaces (#2325)

* update abi-gen with new method interfaces

* wip: get all packages to build

* wip: get all packages to build

* Fix two contract wrapper calls

* Export necessary types part of the contract wrapper public interfaces

* Revive and fix wrapper_unit_tests

* Remove duplicate type

* Fix lib_exchange_rich_error_decoder tests

* Fix remaining test failures in contracts-* packages

* Prettier fixes

* remove transactionHelper

* lint and update changelogs

* Fix prettier

* Revert changes to reference docs

* Add back changelog already published and add revert changelog entry

* Add missing CHANGELOG entries

* Add missing comma

* Update mesh-rpc-client dep

* Update Mesh RPC logic in @0x/orderbook to v6.0.1-beta

* Align package versions

contracts/integrations/test/function-assertions/createStakingPool.ts

@@ -15,13 +15,13 @@ import { DeploymentManager } from '../deployment_manager';
 export function validCreateStakingPoolAssertion(
     deployment: DeploymentManager,
     pools: StakingPoolById,
-): FunctionAssertion<string> {
+): FunctionAssertion<string, string> {
     const { stakingWrapper } = deployment.staking;
 
     return new FunctionAssertion(stakingWrapper.createStakingPool, {
         // Returns the expected ID of th created pool
         before: async () => {
-            const lastPoolId = await stakingWrapper.lastPoolId.callAsync();
+            const lastPoolId = await stakingWrapper.lastPoolId().callAsync();
             // Effectively the last poolId + 1, but as a bytestring
             return `0x${new BigNumber(lastPoolId)
                 .plus(1)