Hi, I'm working on aproject that relies onetherscan-python for communicating with Etherscan.io's API, and having support for querying stuff on the other testnets will come really handy for the end goal of it.

Luckily, I already added that feature on a fork I did from this project following the overall "minimalism" (as said on the description) and also adding the testnets to the module tests with their own working/stable test cases (randomly sampled - [*]) along with a minimalist usage example on the README.

[*] Unfortunately, I don't possess a PRO API key, so I couldn't find working test cases for the PRO endpoints nor I know if they are already passing with those parameters or not.