fix: allow bundling of ts/tsx files

Author: hanskr

lib/reader.js

@@ -69,7 +69,10 @@ module.exports = async (feeds, options) => {
         })
     );
 
-    const bundler = browserify({ entries, debug: opts.sourceMaps });
+    const bundler = browserify(entries, {
+        debug: opts.sourceMaps,
+        extensions: ['.js', '.es', '.es6', '.jsx', '.tsx', '.ts'],
+    });
 
     bundler.transform(envify, {
         _: 'purge',