chore(deps): bump github.com/prometheus/client_golang (#67)

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.7.1 to 1.8.0.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/master/CHANGELOG.md)
- [Commits](prometheus/client_golang@v1.7.1...v1.8.0)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -24,7 +24,7 @@ require (
 	github.com/powerman/narada4d v1.7.0
 	github.com/powerman/sqlxx v0.2.0
 	github.com/powerman/structlog v0.7.1
-	github.com/prometheus/client_golang v1.7.1
+	github.com/prometheus/client_golang v1.8.0
 	github.com/rs/cors v1.7.0
 	github.com/sebest/xff v0.0.0-20160910043805-6c115e0ffa35
 	github.com/smartystreets/goconvey v1.6.4