Add supporting themes required for Lotusdocs

themes/hugo-mod-jslibs-dist/popperjs/package/lib/dom-utils/getNodeScroll.js.flow

@@ -0,0 +1,14 @@
+// @flow
+import getWindowScroll from './getWindowScroll';
+import getWindow from './getWindow';
+import { isHTMLElement } from './instanceOf';
+import getHTMLElementScroll from './getHTMLElementScroll';
+import type { Window } from '../types';
+
+export default function getNodeScroll(node: Node | Window) {
+  if (node === getWindow(node) || !isHTMLElement(node)) {
+    return getWindowScroll(node);
+  } else {
+    return getHTMLElementScroll(node);
+  }
+}