go.mod: update to Go 1.23

The go directive was set to 1.13 but dependencies require 1.16+ (io/fs),
causing CI to fail. Bump to 1.23 and tidy.

Co-Authored-By: roachdev-claude <roachdev-claude-bot@cockroachlabs.com>

Author: tbg

.github/workflows/go-test.yml

@@ -14,6 +14,6 @@ jobs:
 
       - uses: actions/setup-go@v5
         with:
-          go-version-file: go.mod
+          go-version: stable
 
       - run: go test ./...

go.mod

@@ -1,6 +1,8 @@
 module github.com/nvanbenschoten/benchdiff
 
-go 1.13
+go 1.23
+
+toolchain go1.24.3
 
 require (
 	github.com/google/pprof v0.0.0-20210720184732-4bb14d4b1be1
@@ -9,3 +11,25 @@ require (
 	golang.org/x/perf v0.0.0-20250106172127-400946f43c82
 	google.golang.org/api v0.126.0
 )
+
+require (
+	cloud.google.com/go/compute/metadata v0.3.0 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/google/s2a-go v0.1.4 // indirect
+	github.com/google/safehtml v0.0.2 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.2.3 // indirect
+	github.com/googleapis/gax-go/v2 v2.11.0 // indirect
+	go.opencensus.io v0.24.0 // 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/sys v0.29.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230530153820-e85fd2cbaebc // indirect
+	google.golang.org/grpc v1.55.0 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
+)