Use typeof === 'undefined' instead of void 0

Author: jetpacmonkey

lib/rules/prop-types.js

@@ -467,7 +467,7 @@ module.exports = {
      *    the property is declared without the need for further analysis.
      */
     function buildTypeAnnotationDeclarationTypes(annotation, seen) {
-      if (seen === void 0) {
+      if (typeof seen === 'undefined') {
         // Keeps track of annotations we've already seen to
         // prevent problems with recursive types.
         seen = new Set();