Merge pull request percona#32 from percona/pmm-2.16-go-mod

Use go mod.

Author: askomorokhov

Gopkg.lock

@@ -0,0 +1,22 @@
+module github.com/prometheus-community/postgres_exporter
+
+go 1.14
+
+require (
+	github.com/alecthomas/units v0.0.0-20210208195552-ff826a37aa15 // indirect
+	github.com/blang/semver v3.5.1+incompatible
+	github.com/golang/protobuf v1.5.1 // indirect
+	github.com/lib/pq v1.9.0
+	github.com/percona/exporter_shared v0.7.2
+	github.com/prometheus/client_golang v1.10.0
+	github.com/prometheus/client_model v0.2.0
+	github.com/prometheus/common v0.19.0
+	github.com/prometheus/promu v0.11.1 // indirect
+	golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4 // indirect
+	golang.org/x/sys v0.0.0-20210320140829-1e4c9ba3b0c4 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	gopkg.in/alecthomas/kingpin.v2 v2.2.6
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c
+	gopkg.in/yaml.v2 v2.4.0
+)