Add supporting themes required for Lotusdocs

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

@@ -0,0 +1,6 @@
+// @flow
+import { type Variation, type Placement } from '../enums';
+
+export default function getVariation(placement: Placement): ?Variation {
+  return (placement.split('-')[1]: any);
+}