v1.2.0

Changelog

• 816cd5d feat: accept private key with or without 0x prefix
• 6bbfaf7 feat: add hcaptcha verification feature
• 20f049d feat: configure frontend token symbol via command-line argument
• b4aa78f feat: support decimal payout amount
• 598cef1 feat: support sending eip1559 tx type
• 5e23f23 feat: support using ENS name to claim test ether
• 07b04a5 refactor: build frontend with vite
• 59d07fb refactor: change request and response of claim handler to json format
• 9ecd8c4 refactor: maintain nonce locally