Add base

[Tritium-VLK]

What I did

Just added a few lines to the regex to accept new env vars for BASE.

Also updated the starting network-config file to include mainnets and forks.
Related issue: #

How I did it

Just added a few lines that I am using locally.

How to verify it

I'm a forked version actively to operate on these chains and run cross-chain reporting.

I did not see any tests for side chain explorers, so I did not add one. I also could not find a fitting area to add more to the docs.

Checklist

• I have confirmed that my PR passes all linting checks
• I have included test cases
• I have updated the documentation
• I have added an entry to the changelog

[Tritium-VLK]

@charles-cooper here's base chain also. Then any chance for a new version number/tag so we can stop using a forked repo?

[iamdefinitelyahuman]

Thanks for this. Need to find a way to future-proof this, some standard format of XXX_TOKEN so new chains don't endlessly require PRs (especially since the maintainer is asleep at the wheel lol)