Web3.py intersphinx fails to resolve some objects

### What was wrong?

[I am writing a library that depends on Web3.py](https://web3-ethereum-defi.readthedocs.io/). The library Sphinx documentation refers to Web3 documentation using [intersphinx](https://www.sphinx-doc.org/en/master/usage/extensions/intersphinx.html).

* Some objects get resolved like `web3.Contract`
* some objects do not get resolved like `web3.Web3`

`Web3` not resolved (no link):

`web3.contract.Contract` correctly resolved (has link):

### How can it be fixed?

I have no idea not. There might be some ways to fine-tune Sphinx documentation generation to be able to map aliased, etc. imports that may cause the issues in object resolution.