fix broken accepted search on types

cmd/main.go

@@ -14,7 +14,6 @@ func main() {
 	header := buildRow()
 	//content := buildRow()
 	//footer := buildRow()
-
 	pdf.Add(header /*content, footer*/)
 
 	err := pdf.Generate("v2.pdf")

go.mod

@@ -1,6 +1,6 @@
 module github.com/johnfercher/maroto
 
-go 1.13
+go 1.18
 
 require (
 	github.com/boombuler/barcode v1.0.1

pkg/v2/types.go

@@ -1,5 +1,7 @@
 package v2
 
+import "slices"
+
 const (
 	Document = "document"
 	Row      = "row"
@@ -16,8 +18,10 @@ func (t DocumentType) String() string {
 }
 
 func (t DocumentType) Accept(dt string) bool {
-	_, ok := buildAcceptedMap()[dt]
-	return ok
+	if val, ok := buildAcceptedMap()[t.String()]; ok {
+		return slices.Contains(val, dt)
+	}
+	return false
 }
 
 func buildAcceptedMap() map[string][]string {