upgrade go and modules (#6)

* go get -u ./... && go mod tidy

* example: go get -u ./... && go mod tidy

* fix deprecated warning

example/logging/function_test.go

@@ -2,7 +2,7 @@ package function
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"net/http/httptest"
@@ -19,7 +19,7 @@ func TestExampleLogging(t *testing.T) {
 	if err != nil {
 		log.Fatal(err)
 	}
-	greeting, err := ioutil.ReadAll(res.Body)
+	greeting, err := io.ReadAll(res.Body)
 	res.Body.Close()
 	if err != nil {
 		log.Fatal(err)

example/logging/go.mod

@@ -1,7 +1,43 @@
 module github.com/groove-x/cloudfunctions/example/logging
 
-go 1.13
+go 1.22.0
 
-require github.com/groove-x/cloudfunctions v0.0.0-20200115112730-1bcff9cbd315
+toolchain go1.23.4
+
+require github.com/groove-x/cloudfunctions v0.2.5
+
+require (
+	cloud.google.com/go v0.118.0 // indirect
+	cloud.google.com/go/auth v0.14.0 // indirect
+	cloud.google.com/go/auth/oauth2adapt v0.2.7 // indirect
+	cloud.google.com/go/compute/metadata v0.6.0 // indirect
+	cloud.google.com/go/logging v1.13.0 // indirect
+	cloud.google.com/go/longrunning v0.6.4 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/google/s2a-go v0.1.9 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.3.4 // indirect
+	github.com/googleapis/gax-go/v2 v2.14.1 // indirect
+	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.59.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.59.0 // indirect
+	go.opentelemetry.io/otel v1.34.0 // indirect
+	go.opentelemetry.io/otel/metric v1.34.0 // indirect
+	go.opentelemetry.io/otel/trace v1.34.0 // indirect
+	golang.org/x/crypto v0.32.0 // indirect
+	golang.org/x/net v0.34.0 // indirect
+	golang.org/x/oauth2 v0.25.0 // indirect
+	golang.org/x/sync v0.10.0 // indirect
+	golang.org/x/sys v0.29.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
+	golang.org/x/time v0.9.0 // indirect
+	google.golang.org/api v0.217.0 // indirect
+	google.golang.org/genproto v0.0.0-20250115164207-1a7da9e5054f // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20250115164207-1a7da9e5054f // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250115164207-1a7da9e5054f // indirect
+	google.golang.org/grpc v1.69.4 // indirect
+	google.golang.org/protobuf v1.36.3 // indirect
+)
 
 replace github.com/groove-x/cloudfunctions => ../../