media: fixed bug when media size can be decimal

- produces invalid docx document

src/file/media/media.ts

@@ -23,8 +23,8 @@ export class Media {
                     y: dimensions.height,
                 },
                 emus: {
-                    x: dimensions.width * 9525,
+                    x: Math.round(dimensions.width * 9525),
-                    y: dimensions.height * 9525,
+                    y: Math.round(dimensions.height * 9525),
                 },
             },
         };