🐛 [BUG] - Transaction validation

[HiiiiD]

Description

Transaction.of() validation will break when using signerUtils.transactionBodyToTransactionRequestInput when dependsOn is set to null

Reproduction URL

No response

Reproduction steps

1. Create a transaction body like this one (`dependsOn` is set to null): 

{
      blockRef: '0x0000000000000000',
      chainTag: 16,
      clauses: [
        {
          to: '0x0000000000000000000000000000000000000001',
          value: '0x0',
          data: '0x1234'
        },
        {
          to: '0x0000000000000000000000000000000000000001',
          value: '0x0',
          data: '0x1234'
        }
      ],
      dependsOn: null,
      expiration: 32768,
      gas: 62762,
      gasPriceCoef: 128,
      nonce: 2876988663801153,
      reserved: undefined
    }

2. When passing this value to `signerUtils.transactionBodyToTransactionRequestInput`, the output is:

{
      from: undefined,
      chainTag: 16,
      blockRef: '0x0000000000000000',
      expiration: 32768,
      clauses: [
        {
          to: '0x0000000000000000000000000000000000000001',
          value: '0x0',
          data: '0x1234'
        },
        {
          to: '0x0000000000000000000000000000000000000001',
          value: '0x0',
          data: '0x1234'
        }
      ],
      gasPriceCoef: 128,
      gas: 62762,
      dependsOn: undefined,
      nonce: 2876988663801153,
      reserved: undefined
    }

3. If this output is then passed to `Transaction.of`, internally it'll call Transaction.isValidBody, which will throw an error for a malformed body since `dependsOn` is `undefined`

Screenshots

![DESCRIPTION](LINK.png)

Logs

OS

Windows