feat:get value add header data

src/editor/core/draw/Draw.ts

@@ -494,7 +494,7 @@ export class Draw {
 
   public getValue(): IEditorResult {
     // 配置
-    const { width, height, margins, watermark } = this.options
+    const { width, height, margins, watermark, header } = this.options
     // 数据
     const data = zipElementList(this.elementList)
     return {
@@ -502,6 +502,7 @@ export class Draw {
       width,
       height,
       margins,
+      header: header.data ? header : undefined,
       watermark: watermark.data ? watermark : undefined,
       data
     }

src/editor/interface/Editor.ts

@@ -51,6 +51,7 @@ export interface IEditorResult {
   width: number;
   height: number;
   margins: IMargin;
+  header?: IHeader;
   watermark?: IWatermark;
   data: IElement[];
 }