Change uuid lib to fix vulnerability

Change github.com/satori/go.uuid to github.com/gofrs/uuid. The former is not a
maintained library, and since it has a critical vulnerability CVE-2021-3538
there's an ongoing discussion proposing to change it for the later.

collector/slave_hosts.go

@@ -20,8 +20,8 @@ import (
 	"database/sql"
 
 	"github.com/go-kit/log"
+	"github.com/gofrs/uuid"
 	"github.com/prometheus/client_golang/prometheus"
-	"github.com/satori/go.uuid"
 )
 
 const (

go.mod

@@ -4,11 +4,12 @@ require (
 	github.com/DATA-DOG/go-sqlmock v1.5.0
 	github.com/go-kit/log v0.2.0
 	github.com/go-sql-driver/mysql v1.6.0
+	github.com/gofrs/uuid v4.2.0+incompatible
 	github.com/prometheus/client_golang v1.11.0
 	github.com/prometheus/client_model v0.2.0
 	github.com/prometheus/common v0.32.1
 	github.com/prometheus/exporter-toolkit v0.7.0
-	github.com/satori/go.uuid v1.2.0
+	github.com/satori/go.uuid v1.2.0 // indirect
 	github.com/smartystreets/goconvey v1.7.2
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
 	gopkg.in/ini.v1 v1.63.2

go.sum

@@ -77,6 +77,8 @@ github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KE
 github.com/go-sql-driver/mysql v1.6.0 h1:BCTh4TKNUYmOmMUcQ3IipzF5prigylS7XXjEkfCHuOE=
 github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
+github.com/gofrs/uuid v4.2.0+incompatible h1:yyYWMnhkhrKwwr8gAOcOCYxOOscHgDS9yZgBrnJfGa0=
+github.com/gofrs/uuid v4.2.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=