Typo after abi formatting using interface.format function

[Kharabet]

Describe the bug
I was trying to get l1BaseFee using OVMGasPriceOracle contract. I have initialized it using the following code:

  const OVMGasPriceOracle = getContractFactory('OVM_GasPriceOracle').attach(
    predeploys.OVM_GasPriceOracle
  )
  const formatted = OVMGasPriceOracle.interface.format(ethers.utils.FormatTypes.json) as string
  const abi = JSON.parse(formatted)
  return new web3.eth.Contract(abi, OVMGasPriceOracle.address)

In formatted there is a typo in abi structure: ouput instead of output which doesn't allow to parse the result of the method call

Additional context
The issue comes actually from ethers.js formatter and they have fixed it here ethers-io/ethers.js#1275 in version 5.0.29

In package json I see ethers.js v 5.0.0 as a dependency. Upgrading it to v 5.0.29 would resolve the issue

[smartcontracts]

The @eth-optimism/contracts package has ethers@^5 as a peer dependency, so the version of ethers will depend on the version you have installed in your project. If you install the latest version of ethers within your project, this should work.