Release v0.4.2

What's Changed

• update deps by @salman01zp in #39
• Fix build by @salman01zp in #40
• implement get_last_block_number/get_unfinalized_tail_block_number by @baidang201 in #43
• Update metadata and config by @salman01zp in #44
• update eth2-pallet-init/substrate_pallet_client.rs get_client_mode by @baidang201 in #46
• Update eth1 infura api key when load light client relayer config by @baidang201 in #48
• fix get_execution_blocks_between parameter order by @baidang201 in #50
• Update readme by @salman01zp in #45
• Prevent init_pallet double initialization by @baidang201 in #51
• Update config by @salman01zp in #52
• order get_execution_blocks_between parameter use min-max by @baidang201 in #55
• Update readme by @salman01zp in #53
• Update fork version and config by @salman01zp in #57

Full Changelog: v0.4.1...v0.4.2