Add supporting themes required for Lotusdocs

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

@@ -0,0 +1,12 @@
+// @flow
+import type { Rect, ClientRectObject } from '../types';
+
+export default function rectToClientRect(rect: Rect): ClientRectObject {
+  return {
+    ...rect,
+    left: rect.x,
+    top: rect.y,
+    right: rect.x + rect.width,
+    bottom: rect.y + rect.height,
+  };
+}