Arbitrum Token Bridge v1.2.0

What's Changed

This release contains improvement to the token bridge creator contracts enabling the L1AtomicTokenBridgeCreator to return consistent addresses after upgrading. No change has been made to the actual bridge contracts and existing deployments are not required to be upgraded. Note that the interface of L1AtomicTokenBridgeCreator is changed to relies on the inbox address instead of chainid.

• feat: add registry by @gzeoneth in #63
• fix: blockscout verification by @gzeoneth in #59
• Add instructions for verifying token bridge deployment by @gvladika in #60
• chore: add BASECHAIN_RPC to verification guide by @gzeoneth in #62
• chore: add missing UpgradeExecutor test by @TucksonDev in #65
• Add Foundry unit test coverage for token bridge factory by @gvladika in #64

Full Changelog: v1.1.2...v1.2.0