Update nim-ethers

[marcinczenko]

We released the new version of nim-ethers and as the changes applied by Adam are braking changes I am just kicking it out here.

Mark suggested to create a new release tag with version 1.0.0 (as we have a braking change and this is what we agreed to do on the first occasion).

I can create that one tomorrow.

To fix the compilation errors coming from the new API, I would need to better understand the intention of introducing the Result type.

Is the intention to do something like this

proc onEvent(event: ?!StorageRequested) {.upraises:[].} =
  if e =? event:
    callback(e.requestId, e.ask, e.expiry)

or

OnRequest* = proc(id: ?!RequestId,
                  ask: ?!StorageAsk,
                  expiry: ?!UInt256) {.gcsafe, upraises:[].}

or something else?

[AuHau]

There is my PR open that brings the latest nim-ethers here: #985

So IMHO this one is not needed.

[marcinczenko]

Closing in favour of #985.