Bump github.com/prometheus/promu from 0.18.0 to 0.18.1 in /tools#386

JiriCtvrtka merged 1 commit intomainpercona/postgres_exporter:mainfrom

dependabot/go_modules/tools/github.com/prometheus/promu-0.18.1percona/postgres_exporter:dependabot/go_modules/tools/github.com/prometheus/promu-0.18.1Copy head branch name to clipboard