v0.21.11

What's Changed

• Tests for gas multiplier by @jmoreira-valory in #2398
• Update gas multiplier handling and tests by @OjusWiZard in #2399
• Feat: ERC8004 contracts for Arbitrum and Optimism by @OjusWiZard in #2400
• Chore: Release v0.21.11 by @OjusWiZard in #2401

Full Changelog: v0.21.10...v0.21.11