[EPIC] Pull all major chains

[dawsbot]

The full list is available here: https://etherscan.io/eaas

This is ordered by priority @kylewandishin

• [x] etherscan (Done via #23)
• [x] basescan (tracked via #29)
• [ ] polygon
• [x] bscscan (done via https://github.com/dawsbot/evm-labels/pull/56)
• [x] gnosis (done via https://github.com/dawsbot/evm-labels/pull/55)
• [ ] ftmscan
• [x] optimism (tracked via https://github.com/dawsbot/evm-labels/pull/41)
• [x] arbitrum (https://github.com/dawsbot/evm-labels/pull/46)
• [x] celo (https://github.com/dawsbot/evm-labels/pull/48)
• [ ] linea
• [ ] scroll