Please add Aurora support

Our team has deployed Multicall contract on Aurora mainnet and testnet for our own use

Easy two line addition here - https://github.com/cavanmflynn/ethers-multicall/blob/fb84bcc3763fe54834a35a44c34d610bafc87ce5/src/provider.ts#L51

```
    1313161554: '0xdc1522872E440cF9cD48E237EAFEfaa5F157Ca1d',
    1313161555: '0x8f81207F59A4f86d68608fF90b259A0927242967'
```