Fix spelling of "margin"

src/file/table/table-cell/cell-margin/table-cell-margins.ts

@@ -0,0 +1,21 @@
+// http://officeopenxml.com/WPtableCellProperties-Margins.php
+import { XmlComponent } from "file/xml-components";
+
+import { BottomCellMargin, LeftCellMargin, RightCellMargin, TopCellMargin } from "./cell-margin";
+
+export interface ITableCellMarginOptions {
+    readonly top?: number;
+    readonly left?: number;
+    readonly bottom?: number;
+    readonly right?: number;
+}
+
+export class TableCellMargin extends XmlComponent {
+    constructor({ top = 0, left = 0, right = 0, bottom = 0 }: ITableCellMarginOptions) {
+        super("w:tcMar");
+        this.root.push(new TopCellMargin(top));
+        this.root.push(new BottomCellMargin(bottom));
+        this.root.push(new RightCellMargin(right));
+        this.root.push(new LeftCellMargin(left));
+    }
+}