Rebase with upstream (#56)

### What was the problem?

This PR resolves
[LISK-1069](https://onchaincollective.atlassian.net/browse/LISK-1069)

### How was it solved?

- [x] `git rebase -S --keep-base upstream/master`

```sh
sameer@Sameers-MacBook-Pro across-relayer % git remote -v
origin  [email protected]:LiskHQ/across-relayer.git (fetch)
origin  [email protected]:LiskHQ/across-relayer.git (push)
upstream        https://github.com/across-protocol/relayer.git (fetch)
upstream        https://github.com/across-protocol/relayer.git (push)
```

### How was it tested?

`yarn install --frozen-lockfile && yarn eslint && yarn format && yarn
relay --wallet void --address <ADDRESS>`


[LISK-1069]:
https://onchaincollective.atlassian.net/browse/LISK-1069?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ