Add supporting themes required for Lotusdocs

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

@@ -0,0 +1,13 @@
+// @flow
+export type * from './types';
+export * from './enums';
+export * from './modifiers';
+
+// eslint-disable-next-line import/no-unused-modules
+export { popperGenerator, detectOverflow, createPopper as createPopperBase } from './createPopper';
+
+// eslint-disable-next-line import/no-unused-modules
+export { createPopper } from './popper';
+
+// eslint-disable-next-line import/no-unused-modules
+export { createPopper as createPopperLite } from './popper-lite';