Bump declared module and internal usage to /v3/

internal/genflags/cmd/genflags/main.go

@@ -13,8 +13,8 @@ import (
 	"syscall"
 	"text/template"
 
-	"github.com/urfave/cli/v2"
-	"github.com/urfave/cli/v2/internal/genflags"
+	"github.com/urfave/cli/v3"
+	"github.com/urfave/cli/v3/internal/genflags"
 	"gopkg.in/yaml.v3"
 )
 

internal/genflags/package_test.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/urfave/cli/v2/internal/genflags"
+	"github.com/urfave/cli/v3/internal/genflags"
 )
 
 func TestTypeName(t *testing.T) {

internal/genflags/spec_test.go

@@ -4,7 +4,7 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/urfave/cli/v2/internal/genflags"
+	"github.com/urfave/cli/v3/internal/genflags"
 )
 
 func TestSpec_SortedFlagTypes(t *testing.T) {