Add OutlineLevel Paragraph property

src/file/paragraph/links/outline-level.ts

@@ -0,0 +1,17 @@
+// http://officeopenxml.com/WPparagraph.php
+import { Attributes, XmlComponent } from "file/xml-components";
+
+export class OutlineLevel extends XmlComponent {
+    public readonly level: string;
+
+    constructor(level: string) {
+        super("w:outlineLvl");
+        this.level = level;
+        this.root.push(
+            new Attributes({
+                val: level,
+            }),
+        );
+    }
+
+}