0 gas price txs no longer accepted after eip-1559 in relayer.test

[sdelvalle57]

Im trying to run the relayer.test.ts file but im getting error 0 gas price txs no longer accepted after eip-1559

  const tx1 = {
            chainId,
            data: transferData,
            from: user.address,
            gasLimit: BigNumber.from('250000'),
            gasPrice: Zero,
            nonce,
            to: dai.address,
            value: Zero,
   };