Update addresses with checksummed versions

[fadeev]

Right now when using @uniswap/sdk, it complains about addresses returned by getAddress not being checksummed.

import { ChainId, Token, WETH, Fetcher, Route } from "@uniswap/sdk";
import { getAddress } from "@zetachain/protocol-contracts";

const tokenAddress = getAddress("zetaToken", hre.network.name as any);
const token = new Token(5, tokenAddress, 18);

Warning: 0x0000c304d2934c00db1d51995b9f6996affd17c0 is not checksummed.

I'm proposing we update addresses (like 0x0000c304d2934c00db1d51995b9f6996affd17c0) with checksummed versions (0x0000c304D2934c00Db1d51995b9f6996AffD17c0).

[fadeev]

cc @andresaiello