decodeParameters (web3-eth-abi) should accept readonly AbiInput[]

```ts
decodeParameters((abi as AbiFunctionFragment).outputs, output)
```

reports the following type error:

```
Argument of type 'readonly AbiParameter[]' is not assignable to parameter of type 'AbiInput[]'.
```

I have to write this but this is unnecessary

```ts
decodeParameters([...(abi as AbiFunctionFragment).outputs], output)
```