v1.8.0-rc2

What's Changed

• docs: add metrics docs by @simlecode in #93
• test: 修复测试中的数据冲突 / fix data rece by @simlecode in #85
• fix: rm duplicated metrics by @LinZexiao in #94
• feat:opt wallet listen log by @hunjixin in #92
• chore: bump version to v1.8.0-rc2 by @simlecode in #96

Full Changelog: v1.8.0-rc1...v1.8.0-rc2