update go.mod in hack/tools to go1.18

Signed-off-by: cpanato <ctadeu@gmail.com>

hack/tools/go.mod

@@ -1,11 +1,31 @@
 module github.com/sigstore/fulcio/hack/tools
 
-go 1.16
+go 1.18
 
 require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/googleapis/api-linter v1.33.2
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.11.2
 	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.2.0
 	google.golang.org/protobuf v1.28.1
 )
+
+require (
+	bitbucket.org/creachadair/stringset v0.0.10 // indirect
+	github.com/bmatcuk/doublestar/v2 v2.0.4 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/gertd/go-pluralize v0.1.7 // indirect
+	github.com/golang/glog v1.0.0 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/jhump/protoreflect v1.10.1 // indirect
+	github.com/mattn/go-runewidth v0.0.9 // indirect
+	github.com/olekukonko/tablewriter v0.0.5 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/stoewer/go-strcase v1.2.0 // indirect
+	golang.org/x/net v0.0.0-20220624214902-1bab6f366d9e // indirect
+	golang.org/x/sys v0.0.0-20220610221304-9f5ed59c137d // indirect
+	golang.org/x/text v0.3.7 // indirect
+	google.golang.org/genproto v0.0.0-20220805133916-01dd62135a58 // indirect
+	google.golang.org/grpc v1.48.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)