Just pagebreak, update test

ts/docx/paragraph/index.ts

@@ -98,7 +98,7 @@ export class Paragraph extends XmlComponent {
     }
 
     public thematicBreak(): Paragraph {
-        this.root.push(new ThematicBreak());
+        this.properties.push(new ThematicBreak());
         return this;
     }
 

ts/tests/docx/paragraph/paragraphTests.ts

@@ -144,13 +144,11 @@ describe("Paragraph", () => {
             const tree = new Formatter().format(paragraph);
             expect(tree).to.deep.equal({
                 "w:p": [{
-                    "w:pPr": [{
                     "w:r": [
                         {"w:rPr": []},
                         {"w:br": [{_attr: {"w:type": "page"}}]},
                     ],
                 }],
-                }],
             });
         });
     });