🐍🏖️ Cancun Devnet 9 Release 3

This release mainly serves to update the EIP-4788 beacon roots address to 0x000F3df6D732807Ef1319fB7B8bB8522d0Beac02, as updated in ethereum/EIPs/pull/7672.

🧪 Test Cases

• 🐞 EIP-4844: Fix invalid blob txs pre-Cancun engine response (#306).
• ✨ EIP-4788: Final update to the beacon root address (#312).

📋 Misc

• ✨ Docs: Changelog added (#305).
• ✨ CI/CD: Run development fork tests in Github Actions (#302).
• ✨ CI/CD: Generate test JSON fixtures on push (#303).

💥 Breaking Change

Please use development fixtures from now on when testing Cancun. These refer to changes that are currently under development within clients:

• fixtures: All tests until the last stable fork (Shanghai)
• fixtures_develop: All tests until the last development fork (Cancun)
• fixtures_hive: All tests until the last stable fork (Shanghai) in hive format (Engine API directives instead of the usual BlockchainTest format)
• fixtures_develop_hive: All tests until the last development fork (Cancun) in hive format