Add Math Summation

src/file/paragraph/math/n-ary/math-super-script.ts

@@ -0,0 +1,12 @@
+// http://www.datypic.com/sc/ooxml/e-m_e-1.html
+import { XmlComponent } from "file/xml-components";
+
+import { MathRun } from "../math-run";
+
+export class MathSuperScript extends XmlComponent {
+    constructor(readonly run: MathRun) {
+        super("m:sup");
+
+        this.root.push(run);
+    }
+}