PMM-7 bump go up to 1.21 (#188)

* PMM-7 bump go up to 1.20

* PMM-7 bump go up to 1.21

* PMM-7 update dependencies

* PMM-7 tidy up the deps

Author: ademidoff

go.mod

@@ -1,6 +1,6 @@
 module github.com/prometheus-community/postgres_exporter
 
-go 1.19
+go 1.21
 
 require (
 	github.com/DATA-DOG/go-sqlmock v1.5.2

go.sum

@@ -28,6 +28,7 @@ github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg
 github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/gopherjs/gopherjs v1.17.2 h1:fQnZVsXk8uxXIStYb0N4bGk7jeyTalG/wsZjQ25dO0g=
 github.com/gopherjs/gopherjs v1.17.2/go.mod h1:pRRIvn/QzFLrKfvEz3qUuEhtE/zLCWfreZ6J5gM2i+k=
 github.com/jpillora/backoff v1.0.0 h1:uvFg412JmmHBHw7iwprIxkPMI+sGQ4kzOWsMeHnm2EA=

tools/go.mod

@@ -1,6 +1,6 @@
 module github.com/percona/postgres_exporter/tools
 
-go 1.17
+go 1.21
 
 require (
 	github.com/golangci/golangci-lint v1.53.3