fix(no-undefined-types): avoid flat-map-polyfill entirely; further further fix for #366

Author: brettz9

package.json

@@ -7,7 +7,6 @@
   "dependencies": {
     "comment-parser": "^0.6.2",
     "debug": "^4.1.1",
-    "flat-map-polyfill": "^0.3.8",
     "jsdoctypeparser": "5.0.1",
     "lodash": "^4.17.15",
     "object.entries-ponyfill": "^1.0.1",

src/rules/noUndefinedTypes.js

@@ -1,5 +1,4 @@
 // eslint-disable-next-line import/no-unassigned-import
-import 'flat-map-polyfill/dist/cjs/flat-map';
 import _ from 'lodash';
 import {parse as parseType, traverse} from 'jsdoctypeparser';
 import iterateJsdoc, {parseComment} from '../iterateJsdoc';
@@ -78,7 +77,7 @@ export default iterateJsdoc(({
     );
   }
 
-  const closureGenericTypes = templateTags.flatMap((tag) => {
+  const closureGenericTypes = _.flatMap(templateTags, (tag) => {
     return jsdocUtils.parseClosureTemplateTag(tag);
   });