fix: no-undefined-types crashing when jsdoc has no tags (#69)

Author: bary12

src/rules/noUndefinedTypes.js

@@ -19,7 +19,7 @@ export default iterateJsdoc(({
     })
     .map(parseComment)
     .flatMap((doc) => {
-      return doc.tags.filter((tag) => {
+      return (doc.tags || []).filter((tag) => {
         return tag.tag === 'typedef';
       });
     })