v1.8.0-rc5

What's Changed

• chore: upgrade go version to 1.18.1 by @diwufeiwen in #142
• fix: close of closed channel for signer by @diwufeiwen in #144
• feat: adding stm annotations/增加STM注解 by @zl03jsj in #143
• fix: connect gateway in sign request by @hunjixin in #145
• Feat: add mining switch / 增加出块控制开关 by @diwufeiwen in #146
• refactor: optimize count winner logical/重构优化countwinner逻辑 by @zl03jsj in #147
• fix: upgrade venus-auth ver for ListUsersWithMiners API by @diwufeiwen in #148

Full Changelog: v1.8.0-rc4...v1.8.0-rc5