1.6.1

Changelog

91285c4 Update grafana/grafana Docker tag to v6.7.5 (#49)
ba479d4 Update grafana/loki Docker tag to v2.1.0 (#50)
7284918 Update grafana/promtail Docker tag to v2.1.0 (#51)
5b824c6 Update module prometheus/client_golang to v1.9.0 (#48)
6b0a133 Update prom/prometheus Docker tag to v2.23.0 (#46)
3884722 bump version
f84b2f2 support endpoint with different param & fix #52