Take over GoTTY maintainership

@yudai built this amazing piece of software, but it now needs a new,
active maintainer. I'm taking a stab at it.

utils/flags.go

@@ -11,7 +11,7 @@ import (
 	"github.com/urfave/cli"
 	"github.com/yudai/hcl"
 
-	"github.com/yudai/gotty/pkg/homedir"
+	"github.com/sorenisanerd/gotty/pkg/homedir"
 )
 
 func GenerateFlags(options ...interface{}) (flags []cli.Flag, mappings map[string]string, err error) {