Fix documentation by adding propTypeCompositionHandler

website/server/extractDocs.js

@@ -226,7 +226,7 @@ var styleDocs = styles.slice(2).reduce(function(docs, filepath) {
     docgen.parse(
       fs.readFileSync(filepath),
       docgenHelpers.findExportedObject,
-      [docgen.handlers.propTypeHandler]
+      [docgen.handlers.propTypeHandler, docgen.handlers.propTypeCompositionHandler]
     );
 
   return docs;