Async web3 provider

[BobTheBuidler]

What I did

Added AsyncProviderAPI, AsyncWeb3Provider, AsyncGethProvider classes

How I did it

I essentially copied the existing providers and just made everything async. There are also a few instances where I had to add async versions of functions in various parts of the code.

How to verify it

Try the various methods you would expect to work from a Geth provider. (eth_call, eth_getLogs, ...)

Checklist

• [ ] All changes are completed
• [ ] New test cases have been added
• [ ] Documentation has been updated

[johnson2427]

@fubuloubu I think this is a huge addition

[fubuloubu]

@fubuloubu I think this is a huge addition

Yes, it's 853 lines to be exact

In all seriousness, I love the submission, but we have to think about how it fits into the overall library before eopening this rabbit hole

[antazoey]

Let's add a link to this PR to the async ticket and close it out, it is a bit noisy right now and stale.

[antazoey]

@BobTheBuidler going to close, as this is like a year old and, full of conflicts, and different than what we want. Let's set up a meeting to discuss. Post in Telegram or something.