refactor!: migrate to urfave/cli v1

Better flexible flags handling.

cli/record/record.go

@@ -1,11 +1,11 @@
 package record
 
 import (
-	"github.com/urfave/cli/v2"
+	"github.com/urfave/cli"
 )
 
 // RecordCommand supports managing DNS entries.
-var RecordCommand = &cli.Command{
+var RecordCommand = cli.Command{
 	Name:      "record",
 	Usage:     "Manage domain name records",
 	Aliases:   []string{"rc"},
@@ -30,7 +30,7 @@ to implement new provider support easily.
     https://pkg.go.dev/github.com/libdns/libdns
 
 `,
-	Subcommands: []*cli.Command{
+	Subcommands: []cli.Command{
 		RecordListCommand,
 		RecordNewCommand,
 		RecordRemoveCommand,