Update minimum supported Go version (#1062)

Update minimum supported Go to 1.17 to support new module format.

Signed-off-by: SuperQ <superq@gmail.com>

.circleci/config.yml

@@ -46,10 +46,6 @@ workflows:
   client_golang:
     jobs:
       # Refer to README.md for the currently supported versions.
-      - test:
-          name: go-1-16
-          go_version: "1.16"
-          run_lint: true
       - test:
           name: go-1-17
           go_version: "1.17"

README.md

@@ -10,7 +10,7 @@ This is the [Go](http://golang.org) client library for
 instrumenting application code, and one for creating clients that talk to the
 Prometheus HTTP API.
 
-__This library requires Go1.16 or later.__
+__This library requires Go1.17 or later.__
 
 ## Important note about releases and stability
 

go.mod

@@ -1,19 +1,31 @@
 module github.com/prometheus/client_golang
 
+go 1.17
+
 require (
 	github.com/beorn7/perks v1.0.1
 	github.com/cespare/xxhash/v2 v2.1.2
 	github.com/davecgh/go-spew v1.1.1
 	github.com/golang/protobuf v1.5.2
-	github.com/jpillora/backoff v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12
 	github.com/prometheus/client_model v0.2.0
 	github.com/prometheus/common v0.34.0
 	github.com/prometheus/procfs v0.7.3
-	golang.org/x/sys v0.0.0-20220328115105-d36c6a25d886
+	golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a
 	google.golang.org/protobuf v1.28.0
 )
 
-exclude github.com/prometheus/client_golang v1.12.1
+require (
+	github.com/jpillora/backoff v1.0.0 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
+	golang.org/x/net v0.0.0-20220225172249-27dd8689420f // indirect
+	golang.org/x/oauth2 v0.0.0-20220223155221-ee480838109b // indirect
+	golang.org/x/text v0.3.7 // indirect
+	google.golang.org/appengine v1.6.6 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+)
 
-go 1.16
+exclude github.com/prometheus/client_golang v1.12.1

go.sum

@@ -261,8 +261,8 @@ golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220328115105-d36c6a25d886 h1:eJv7u3ksNXoLbGSKuv2s/SIO4tJVxc/A+MTpzxDgz/Q=
-golang.org/x/sys v0.0.0-20220328115105-d36c6a25d886/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a h1:dGzPydgVsqGcTRVwiLJ1jVbufYwmzD3LfVPLKsKg+0k=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=