♻ ️ Add support for Solidity version `0.8.20`

[pcaversaccio]

Description

Add support for solc 0.8.20. The content was generated using $ ./nix/make-solc-static.sh.

Checklist

• [x] tested locally
• [ ] added automated tests
• [ ] updated the docs
• [x] updated the changelog

Cc: @d-xo