migrate prometheus/{pkg,model}/labels; fix go.mod

go.mod

@@ -1,9 +1,32 @@
 module github.com/cherti/promauthproxy
 
-go 1.14
+go 1.17
 
 require (
-	github.com/cespare/xxhash v1.1.0 // indirect
-	github.com/prometheus/prometheus v2.5.0+incompatible
-	golang.org/x/net v0.0.0-20200707034311-ab3426394381
+	github.com/prometheus/prometheus v0.35.0
+	golang.org/x/net v0.0.0-20220425223048-2871e0cb64e4
+)
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/dennwc/varint v1.0.0 // indirect
+	github.com/go-kit/log v0.2.0 // indirect
+	github.com/go-logfmt/logfmt v0.5.1 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/grafana/regexp v0.0.0-20220304095617-2e8d9baf4ac2 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/client_golang v1.12.1 // indirect
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/common v0.34.0 // indirect
+	github.com/prometheus/procfs v0.7.3 // indirect
+	github.com/stretchr/testify v1.7.1 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/goleak v1.1.12 // indirect
+	golang.org/x/sys v0.0.0-20220328115105-d36c6a25d886 // indirect
+	google.golang.org/protobuf v1.28.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )