message: Fix smockit for a change in hardhat ^2.4.0
  which changes the way it parses errors from returndata
  Fix provided by
diff: @@ -14,7 +14,12 @@ try {
  ReturnData,
  } = require('hardhat/internal/hardhat-network/provider/return-data')
  decodeRevertReason = (value: Buffer) => {
  - return new ReturnData(value).decodeError()
  + const returnData = new ReturnData(value)
  + if (returnData.isErrorReturnData()) {
  + return returnData.decodeError()
  + } else {
  + return ''
  + }
  }
  }
  // Handle hardhat ^2.2.0
  